Introduction To Human Body Research Paper:
Did you know that our bodies create about a gallon of mucus in just two days! I do. In fact, I know a lot of other interesting facts about the human body, and YOU WILL TOO if you read my paper. In my document below you will find six different essays about the human body. These six essays focus on the muscular, skeletal, circulatory, respiratory, digestive, and nervous system. All of these systems work together to help our body operate our body. The six systems have some unique features that help to keep us alive. However, each system can not work alone - they need each other to be correctly working. For example, the nutrients that get gathered by the digestive system go into the bloodstream(circulatory) to go around the whole body. Over the past 12 weeks we have gathered information, organized our information and thoughts, and paraphrased what trusted websites taught us about each system. We worked with responsibility partners and our papers differently got better after we got there input. Just like each system needs to work together with other, we do the same. The following is the result of our hard work…... Skeletal System:
Our skeletal system is made up of 206 bones. These bones work together to provide our body with support so that we can stand, help us to move so we can walk around, and protect our vital organs like our heart and our brain! Our bones even make and store blood cells for our circulatory system!Without our bones,we would be nothing more than a pile of skin, organs,and muscles on the floor. We would not be able to move our organs would not be safe!
Our bones are made up of many layers. These layers are important because we need our bones to be strong, yet lightweight. In order to achieve this goal, the outside layer of bone is made up of solid, compact bone that makes our bones strong and dense. The next layer of bone is called cancellous (a.k.a spongy bone). This layer allows our bones to be lightweight and transitions us from compact bone into bone marrow. Bone marrow is a thick and spongy section in the middle of a bone where red and white blood cells are formed. Finally, our bones are all covered in a thin membrane called periosteum which is where our muscles attach to bones. So that is how bones are structured in order to keep our bodies strong, yet lightweight.
Although bones are extremely important, we would not be able to move with out joints! Joints are places where two or more bones meet. There are several types of joints in our bodies, but......
we’ll just focus on four of them. The first type of joint is called a hinged joint. Just like the hinges on a door, they allow movement back and forth. We have hinge joints at our elbows and knees, and we even have them in our knuckles! Another type of joint is called a ball and socket joint. This is where one bone has a ball at the end of it and the other bone has a baseball mitt for the ball to sit in. Our shoulders and hips are examples of ball and socket joints. The third type of joint that we studied was called a gliding joint. Gliding joints are places where two or more bones meet and slide past each other. Our wrists and ankles are two examples of gliding joints. The last type of joint is called the pivot joint. A pivot joint works when one bone acts like a ring and the other one sits inside the ring a rotates. Our neck is an example of a pivot joint because it can rotate around and move up and down. At each joint a soft squishy material can be found between bones which keeps them from running each other which would be painful. This is called cartilage. Cartilage, which is bendable, we can also be found in our ears and nose. But all of this wouldn’t be possible without ligaments holding all of our bones together at each joint.
Ligaments are long,stretchy tissue that connect bone to other bone and stabilize joints. Without these ligaments in place bones wouldn’t stay attached to each other and wouldn’t allow joints to move.It’s interesting to note that people who are double-jointed actually just have extremely stretchy ligaments! Joints definitely make movement possible and without them, we’d have a hard time getting are our world!
Bones are definitely are important parts in the human body. They allow us to move, help provide us structure and support, protect our important organs,and even make blood cells! Because bones are designed so well, they are strong,yet lightweight. Thanks to joints, ligaments, and cartilage, we are able to bend and move throughout our world. Finally,the muscles in our body attach to bones, giving us the power to actually move around!
Muscular System:
The muscular system helps the human body move around and have fun. Let’s say you want to move your arms around, eat a sandwich, or run, you use muscles! There are many different types of muscles ,and they all serve different purposes. There is ( e.g. movement, pumping blood, and dilating your pupils). Some of these purposes are controlled by us, while others are controlled automatically by the muscle cell or the brain.
There are two types of categories of the muscles in the human body: voluntary and involuntary. Voluntary muscles are muscles that we have control over. They are the muscles that control our body’s movements and are attached to bones. Skeletal muscles are the only type of voluntary muscle in our body. They pull on bones to cause us to move. skeletal muscles never push,they only pull, and that's why they are nearly always found in pairs. One example of this is the biceps and triceps that are located in our upper arms.When the biceps) want to pull the lower arm up ,they contract or shrink,whiles the triceps relax. When the triceps want to pull the arm down the contract while the biceps relax. This is an example of a pair of muscles working together to make movement. But those muscles wouldn’t be able to do any of this without tendons connecting them to the bones that they move! Tendons are flexible bands of tissue that blend into bones and enable them to move the bones that they were supposed to move. Although skeletal muscles are the only type of voluntary muscle, There are two different types of involuntary muscles!
Unlike voluntary muscles, involuntary muscles are muscles that do things that automatically without knowing it. There are two examples of involuntary muscles. They are cardiac muscle and smooth muscle. Cardiac and smooth muscles are similar because they work automatically, by themselves. Cardiac muscles are muscles found only in our heart, that and are responsible for pumping blood throughout our body. They work without us thinking about them and they contract and relax throughout our entire lives. Smooth muscles are found inside many of our organs (e.g. intestines, esophagus, stomach,and bladder), and help move through our body. Smooth muscles can also be found in your eyes and your blood vessels. Smooth muscle cells look like one big cell, but are actually a bunch of smaller,smooth cells all grouped together(unlike the striated,skeletal cells). So clearly, there are many types of involuntary muscles in our body that do things we had no idea about. Including important tasks like pumping blood and digesting food!
The muscular system is a powerful system that allows us to move, convert food into energy, and circulate blood throughout our body. Our muscles make up over half of our body weight and give our body tone and shape. In the next essay, learn how some of these muscles move blood throughout our body in order to deliver oxygen to all of our cells.
Circulatory System:
The circulatory system helps blood flow throughout our human body. Picture you getting a cut, half of the circulatory system is working to help stop the blood from continuing to flow. Half of the circulatory system works on stopping blood from getting out of our body and the other half works on getting blood throughout our body. Even though we do not have any control of the circulatory system it works really hard and really fast.
Blood is the one thing in our body that has white blood cells, red blood cells, platelets, and plasma. White blood cells are the things that keep our body healthy from infections, germs, and viruses. When you have a bruise it is purple because you broke a blood vessel. Also when you break a blood vessel your white blood cells are trying to clean up the blood that is flowing around that area. That is why your bruises are purple then yellow and then gone. Red blood cells on the other hand are blood cells that carry oxygen throughout your body. Red blood cells are the things that make our blood red and they also allow us to live. Red blood cells are very important like your platelets. For example, platelets are the things that help stop the blood from pouring our of your arm or wherever you have a cut. Your platelets are sticky cells that are moving around in your blood until a blood vessel gets broken then they conjoin and make a net to clot the blood so it stops bleeding. When your blood vessel get broken both your white blood cells and platelets get used. What do your blood cells travel in? Plasma, plasma is the thing in our body that your blood cells travel. Plasma is made up of water, hormones, protein, waste, and nutrients. Whole blood is a mixture of white and red blood cells and plasma. As you can see our blood is very important, just like our blood vessels.
Blood vessels are one of the most important things in our body because they bring blood throughout our body. When the blood is done in the lungs it is oxygenated and that is where arteries come in. Arteries carry the blood that has oxygen in it to the heart. When the blood gets to the heart it squirts out all of the blood into the different places that need it. We also have veins and blood travels through to get back to the heart and lungs. When veins go back to the lungs the blood receives more oxygen to go back to the arteries. Both the arteries and veins would not be able to work without capillaries. Capillaries are the things that pass blood onto the veins or the arteries. Capillaries are very small but do one of the most important things in our body. In order to get the blood vessels and blood working you have to have a heart.
You know how you have a heart that pumps blood to every organ in your body.Well all of that blood that gets pumped into your organs comes from the four chambers of your heart. Your four chambers are called the right atrium,left atrium,right ventricle, and left ventricle. You’re right atrium receives deoxygenated blood and pumps it into the right ventricle. When you're right ventricle receives the deoxygenated blood it squirts the blood out into the lungs. When the lungs get the blood they put oxygen into it. On the other hand your left atrium gets the oxygenated blood and pumps it into the left ventricle which then receives the blood and pumps the blood throughout the body.
We have learned that without the circulatory system we would not be able to stop bleeding or send blood to our organs. The circulatory system is extremely long and travels throughout most of our body. The whole body would not be able to work without the respiratory system as well.
Respiratory System:
The respiratory system helps air travel throughout our human body. In order to breath you have to put our respiratory system to work. Just like the circulatory system half of the respiratory system works on getting air to the lungs while the other half works on getting the carbon-dioxide out. Just because the respiratory system has many steps to it does not mean that it does not work fast or hard.
The air in your body is just like a train station that keeps entering and exiting your body.When air enters your body you use your nose, mouth, nasal passage, epiglottis, and larynx. I know that you probably think that your nose is just a thing that sits on your face, but it really is one of the most important things in our respiratory system. Your nose and mouth makes the air that you inhaled moist, warm, and it filters the air before it goes down into the lungs.(The nose does all of those things so it does not irritate the lungs.) Once you inhale the air and it goes through your nose or mouth the oxygen goes through your nasal cavity. Your nasal cavity is a space full of air behind your nose in the middle of your face. Each nostril has one cavity behind it that helps the air go to the trachea. Next, your epiglottis on the other hand, is a trap door that made up of cartilage. Your epiglottis guards the glottis and makes up some of the larynx. Then, your larynx allows you to air to pass throughout your body and helps the epiglottis out by trying to keep food out of your trachea. Your larynx also contains your voice box that helps you talk. Inside your larynx are your vocal chords that also play a very important part because they control the speed of air going down to your lungs when you talk. Your vocal chords are in your voice box that has tissue in it which makes your vocal chords eventually and it is connected to the trachea or windpipe. Your trachea on the other hand, is a tube like structure that air travels through to get to the bronchi. Your trachea is one of the most important things in your respiratory system. All of this is important, but if your air did not move throughout your lungs you could die. And that is where air moving in your lungs comes in.
When air comes down into your lungs you put many things to work such as your lungs, bronchial tube, bronchial, bronchi, and alveoli. First, your lungs get the air from the bronchial tube and puts it into the pink squishy sponge like space that are your lungs. In that space there are so many things going on that help you transfer oxygen everywhere, and your diaphragm helps the air move through out your lungs. Next, your bronchial tube gets the air from your trachea. Which spreads out into all of the bronchial tubes and goes into your lungs and does it all over again. Then, your bronchus or bronchi gets air and puts it in the left and the right lungs. Your bronchus is a tube that gets air from your bronchial tube and puts it into the lungs. After the air gets into your lungs the air goes through these tiny little branches called bronchioles. Your bronchioles keep splitting into smaller and smaller branches. Finally, when the bronchioles stop spreading out they go into your alveoli. Your alveoli are tiny little air sacks that air was exchanged into. There are about 6 million alveoli in your lungs!
Now we know that the respiratory system is extremely important and without it we would die. Your respiratory system contains really interesting things such as, your lungs can float. As you can see your respiratory system is very important, just like your digestive system!
Digestive System:
Your digestive system helps you break down all of your food to get the nutrients and fibers out and into your cells. Your digestive system has many body parts in it that have to work very hard. Right when you smell something delicious your digestive system starts to work. Your food takes six to eight hours to go through your whole digestive system.
To get everything in your digestive system working you have to use your mouth, teeth, mechanical digestion, saliva, chemical digestion, and tongue. Your mouth takes in the food and right when it enters your mouth your digestive system gets to work. After the food enters your mouth you put your teeth to work. Your teeth break down the food that just entered your mouth to make it easier for your digestive system. This is called mechanical digestion. Mechanical digestion is your teeth chewing your food. Next your tongue tastes the food and starts producing more and more saliva. Your saliva begins to break down the food you just ate. This is called chemical digestion. Then, the food touches the tongue (muscle) which turns the food into a ball. Your tongue is one of the most important muscles in your digestive system. This ball of food is called bolus. Bolus is a big ball of food that is covered in mucus. Bolus has to go all of the way down to the stomach. This is all very important just like your esophagus.
Your esophagus is a really important part of the digestive system. The esophagus is a muscular tube that is connected to the throat. Your esophagus is around 8 inches long and runs further than the heart and the trachea. The esophagus leads down to these two doors that let the food go down into the stomach. In the esophagus peristalsis helps by moving the food down to the stomach. Reverse peristalsis is when the wave like movements of your muscles carries the food up through where it came from (vomiting). Where does your food go after all of this happens though?
Your stomach is a very important part of the digestive system. When all of the food goes into this J shaped organ the food (that came from your esophagus) starts to churn and the stomach breaks down the food that you just swallowed. When your stomach is churning it is using its strong muscles to separate all of the different types of food. Inside the stomach there are digestive juices. Your digestive juices are all separated into different organs. The digestive juices that are in your stomach contain saliva, intestinal juices, and gastric juices. Right before the food exits the stomach it turns into chyme. Chyme is the partially digested food that is in liquid form. Where does all of this food go after the stomach though?
The small intestine is a very long and thin. It sucks up all of the nutrients from the chyme. The small intestine helps your pancreas, gallbladder, and the liver break down food. Inside your small intestine are villi. Your villi are small little finger like things inside your small intestine. Your small intestine like I said before sucks the nutrients into the bloodstream. The walls of the small intestine and absorbs it into the bloodstream to get it to other cells. The pancreas is also a very important part of your digestive system.
Your pancreas makes enzymes that help your whole body digest food better. It also produces a type of hormone. Your pancreatic enzymes break down all of the fats and proteins in your body. Your pancreatic enzymes are a very important part of the digestive system. When the food passes through the pancreas it goes to the liver then the gallbladder.
Your liver and gallbladder are a very important part of the digestive system. Your liver sorts all of the things that are good for your body from your waste. Your liver even turns some of your waste into bile. Next, the waste goes through the gallbladder. Your gallbladder is a small little pouch under the liver. The bile that came from the liver gets stored in the gallbladder. Finally the last thing the the waste goes through is bile. Your bile is fluid that contains cholesterol, bile acids, and water. When the waste is done traveling through the gallbladder and liver it goes to the large intestine.
Your large intestine contains many things that are important. Your actual large intestine sucks most of the water out of your waste and turns it hard. There are many different types of bacteria and germs in the large intestine. When the large intestine sucks up all of the water it pushes it out basically and then the water goes into the bloodstream and travels to the cells that need it. The next stop in our digestive system is the anus. The anus gets the waste that still has some water and bacteria on it and pushes it out.
We now know that the digestive system is a very important part of our body. Your digestive system is a little gross but it is mostly interesting. For example, your food does not need gravity to get the digestive system so if you ate before you did a handstand your food would successfully go to stomach unless reverse peristalsis comes in. The whole digestive system is really cool but the nervous system is very cool too!
Nervous System:
Your nervous system sends messages to and from your brain. Think of your nervous system as a huge highway that is in your body that cars keep going one way then come back the other way. Your whole body would not be able to know when something hurts, feels weird, and when you need to do something in a certain amount of time. When you eat your favorite sandwich or even listen to a conversation your whole nervous system is working on getting information from your brain to the place where it came from.
The human body wouldn’t be able to function well without your brain. Imagine your brain as the computer that controls most of the things in the body. Your brain gets all of the messages from your nerves to react or move a certain way. Your brain made up of many different parts such as the cerebrum, cerebellum, and the Medulla. Your cerebrum is the part of the brain that controls voluntary muscles and movements. Your cerebrum is over half of the brain’s weight. The cerebrum is the part of your memory is stored. Next comes the cerebellum. Your cerebellum is under you cerebrum and smaller then it too. The cerebellum controls your balance and coordination of your muscles. You would not be able to keep your balance without your cerebellum. Your medulla is also a big part of your brain. Your medulla also known as the brainstem is the part of the brain that connects to your spinal cord. It also controls your breathing, heart rate, blood pressure, and when signals leave and enter the brain. Your medulla also controls the digestive system’s activity. The brain is obviously a big part of the nervous system but the brain would not be a big part of the nervous system without nerves and the signal that go through them.
The nerves are a very important part of the nervous system. Your nerves are just like a big highway that goes through your body to tell you when something hurts or when you need to pull or push away. Your nerves also send the signals to your brain that help you do what you do. Next are your sensory nerves. Your sensory nerves are the nerves that tell your brain what is going on around in the world. These nerves come from your 5 senses. (e.g. sight, smell, taste, touch, and hearing). They also send the messages to the brain and down to the spinal cord. After your sensory nerves are your motor nerves. Your motor nerves let the brain control all of our muscles. They let the brain know that they need the muscles to contract and relax so the body can move. Next the spinal cord comes to work. The spinal cord is the main highway for the nerves to send the signals to the brain through. The spinal cord is a very important part of the nervous system. The spinal cord is a very long and important part of the nervous system. Your neurons are the things that send your brain send the signals to help your muscles know when to react a certain way. There are 100 billion neurons in your brain and 13.5 million in your spinal cord. They are a very important part of the human body, just like your synapses. Your synapses are a very important part of the nervous system because they help the nerves send signals to other nerves to send the signal to the brain about what is happening. Your synapses are on the end of the nerve and are very important. Like I said your synapses are very important just like your dendrites. Your dendrites are the branches of nerves that collect the signals from the synapses to tell the nerve what is going on. Your dendrites are the branches of the nerves. Your dendrites are a very important part of the nervous system, just like your axons! Your axons are the part of the nerve that takes the information that the brain needs and takes it away from the soma. They are a big part of the human body because they take the information to the brain. The whole nervous system would not be able to work without the senses or axons!
Your senses are a very important part of the human body because they help detect the taste,smell,touch, and sight of everything you see. Taste is the one sense that something has to enter the body for it to work. The nervous system relates to taste because when the food enters the body your nerves send the brain a message then, the brain sends a signal to the taste buds to start working and taste the food that just entered the body. Taste is a really cool sense to have just like your sight! Sight is a very important part of the nervous system because the optical nerve behind the eye and that is a very important nerve. The optical nerve is an important part of the nervous system because it helps us remember things by picture. Your sight is the most used sense of your 5 senses! As you can see, your sense of sight is a very important sense just like your sense of touch. The sense of touch relates to the nervous system because your nerves send the signal to the brain to make your nerves that are on the top of your fingers to feel the thing you are going to touch. The sense of touch lets you feel the things around you. This is a very important part of the nervous system just like the sense of smell! The sense of smell relates to the nervous system because in the back of the nose there are nerves that smell everything that is around you. Smelling is a very important sense because when the nerves get the aroma it sends it to the Olfactory so the nose can smell it. Hearing is the the last sense I am going to talk about but it definitely not the least! When you hear something it is the nerves in your ear sending the message that was just sent to you to the brain and then the brain knows what the message meant so you respond to the person whom was talking to you. All of the nervous system would not be able to work that well without the 5 senses!
I hope you now know that your nervous system is a big part of the human body. It looks kind of weird but it is really interesting. For example, there are more nerves in the whole human body that the amount of stars in the milky way. As you can see the nervous system is a very big part of the human body and I hope you learned a lot from this essay.
In conclusion, the human body has many systems that each work hard to do specific jobs to benefit our bodies, but they also work together successfully to ensure of us being well. The skeletal system provides support, protection and structure while the muscular system allows us to move, breath, and digest food. The circulatory system transports oxygen and nutrients to the cells of our body while getting rid of waste products and when respiratory system swaps out the oxygen and carbon dioxide. Finally, the digestive system converts food into energy while the nervous system uses that energy to make decisions and maintain memories. I appreciate the time you took to read these essays and hope that you learned something valuable. So the next time you move a muscle or take in a breath, I hope you’ll think about how impressive our human body really is!
Ligaments are long,stretchy tissue that connect bone to other bone and stabilize joints. Without these ligaments in place bones wouldn’t stay attached to each other and wouldn’t allow joints to move.It’s interesting to note that people who are double-jointed actually just have extremely stretchy ligaments! Joints definitely make movement possible and without them, we’d have a hard time getting are our world!
Bones are definitely are important parts in the human body. They allow us to move, help provide us structure and support, protect our important organs,and even make blood cells! Because bones are designed so well, they are strong,yet lightweight. Thanks to joints, ligaments, and cartilage, we are able to bend and move throughout our world. Finally,the muscles in our body attach to bones, giving us the power to actually move around!
Muscular System:
The muscular system helps the human body move around and have fun. Let’s say you want to move your arms around, eat a sandwich, or run, you use muscles! There are many different types of muscles ,and they all serve different purposes. There is ( e.g. movement, pumping blood, and dilating your pupils). Some of these purposes are controlled by us, while others are controlled automatically by the muscle cell or the brain.
There are two types of categories of the muscles in the human body: voluntary and involuntary. Voluntary muscles are muscles that we have control over. They are the muscles that control our body’s movements and are attached to bones. Skeletal muscles are the only type of voluntary muscle in our body. They pull on bones to cause us to move. skeletal muscles never push,they only pull, and that's why they are nearly always found in pairs. One example of this is the biceps and triceps that are located in our upper arms.When the biceps) want to pull the lower arm up ,they contract or shrink,whiles the triceps relax. When the triceps want to pull the arm down the contract while the biceps relax. This is an example of a pair of muscles working together to make movement. But those muscles wouldn’t be able to do any of this without tendons connecting them to the bones that they move! Tendons are flexible bands of tissue that blend into bones and enable them to move the bones that they were supposed to move. Although skeletal muscles are the only type of voluntary muscle, There are two different types of involuntary muscles!
Unlike voluntary muscles, involuntary muscles are muscles that do things that automatically without knowing it. There are two examples of involuntary muscles. They are cardiac muscle and smooth muscle. Cardiac and smooth muscles are similar because they work automatically, by themselves. Cardiac muscles are muscles found only in our heart, that and are responsible for pumping blood throughout our body. They work without us thinking about them and they contract and relax throughout our entire lives. Smooth muscles are found inside many of our organs (e.g. intestines, esophagus, stomach,and bladder), and help move through our body. Smooth muscles can also be found in your eyes and your blood vessels. Smooth muscle cells look like one big cell, but are actually a bunch of smaller,smooth cells all grouped together(unlike the striated,skeletal cells). So clearly, there are many types of involuntary muscles in our body that do things we had no idea about. Including important tasks like pumping blood and digesting food!
The muscular system is a powerful system that allows us to move, convert food into energy, and circulate blood throughout our body. Our muscles make up over half of our body weight and give our body tone and shape. In the next essay, learn how some of these muscles move blood throughout our body in order to deliver oxygen to all of our cells.
Circulatory System:
The circulatory system helps blood flow throughout our human body. Picture you getting a cut, half of the circulatory system is working to help stop the blood from continuing to flow. Half of the circulatory system works on stopping blood from getting out of our body and the other half works on getting blood throughout our body. Even though we do not have any control of the circulatory system it works really hard and really fast.
Blood is the one thing in our body that has white blood cells, red blood cells, platelets, and plasma. White blood cells are the things that keep our body healthy from infections, germs, and viruses. When you have a bruise it is purple because you broke a blood vessel. Also when you break a blood vessel your white blood cells are trying to clean up the blood that is flowing around that area. That is why your bruises are purple then yellow and then gone. Red blood cells on the other hand are blood cells that carry oxygen throughout your body. Red blood cells are the things that make our blood red and they also allow us to live. Red blood cells are very important like your platelets. For example, platelets are the things that help stop the blood from pouring our of your arm or wherever you have a cut. Your platelets are sticky cells that are moving around in your blood until a blood vessel gets broken then they conjoin and make a net to clot the blood so it stops bleeding. When your blood vessel get broken both your white blood cells and platelets get used. What do your blood cells travel in? Plasma, plasma is the thing in our body that your blood cells travel. Plasma is made up of water, hormones, protein, waste, and nutrients. Whole blood is a mixture of white and red blood cells and plasma. As you can see our blood is very important, just like our blood vessels.
Blood vessels are one of the most important things in our body because they bring blood throughout our body. When the blood is done in the lungs it is oxygenated and that is where arteries come in. Arteries carry the blood that has oxygen in it to the heart. When the blood gets to the heart it squirts out all of the blood into the different places that need it. We also have veins and blood travels through to get back to the heart and lungs. When veins go back to the lungs the blood receives more oxygen to go back to the arteries. Both the arteries and veins would not be able to work without capillaries. Capillaries are the things that pass blood onto the veins or the arteries. Capillaries are very small but do one of the most important things in our body. In order to get the blood vessels and blood working you have to have a heart.
You know how you have a heart that pumps blood to every organ in your body.Well all of that blood that gets pumped into your organs comes from the four chambers of your heart. Your four chambers are called the right atrium,left atrium,right ventricle, and left ventricle. You’re right atrium receives deoxygenated blood and pumps it into the right ventricle. When you're right ventricle receives the deoxygenated blood it squirts the blood out into the lungs. When the lungs get the blood they put oxygen into it. On the other hand your left atrium gets the oxygenated blood and pumps it into the left ventricle which then receives the blood and pumps the blood throughout the body.
We have learned that without the circulatory system we would not be able to stop bleeding or send blood to our organs. The circulatory system is extremely long and travels throughout most of our body. The whole body would not be able to work without the respiratory system as well.
Respiratory System:
The respiratory system helps air travel throughout our human body. In order to breath you have to put our respiratory system to work. Just like the circulatory system half of the respiratory system works on getting air to the lungs while the other half works on getting the carbon-dioxide out. Just because the respiratory system has many steps to it does not mean that it does not work fast or hard.
The air in your body is just like a train station that keeps entering and exiting your body.When air enters your body you use your nose, mouth, nasal passage, epiglottis, and larynx. I know that you probably think that your nose is just a thing that sits on your face, but it really is one of the most important things in our respiratory system. Your nose and mouth makes the air that you inhaled moist, warm, and it filters the air before it goes down into the lungs.(The nose does all of those things so it does not irritate the lungs.) Once you inhale the air and it goes through your nose or mouth the oxygen goes through your nasal cavity. Your nasal cavity is a space full of air behind your nose in the middle of your face. Each nostril has one cavity behind it that helps the air go to the trachea. Next, your epiglottis on the other hand, is a trap door that made up of cartilage. Your epiglottis guards the glottis and makes up some of the larynx. Then, your larynx allows you to air to pass throughout your body and helps the epiglottis out by trying to keep food out of your trachea. Your larynx also contains your voice box that helps you talk. Inside your larynx are your vocal chords that also play a very important part because they control the speed of air going down to your lungs when you talk. Your vocal chords are in your voice box that has tissue in it which makes your vocal chords eventually and it is connected to the trachea or windpipe. Your trachea on the other hand, is a tube like structure that air travels through to get to the bronchi. Your trachea is one of the most important things in your respiratory system. All of this is important, but if your air did not move throughout your lungs you could die. And that is where air moving in your lungs comes in.
When air comes down into your lungs you put many things to work such as your lungs, bronchial tube, bronchial, bronchi, and alveoli. First, your lungs get the air from the bronchial tube and puts it into the pink squishy sponge like space that are your lungs. In that space there are so many things going on that help you transfer oxygen everywhere, and your diaphragm helps the air move through out your lungs. Next, your bronchial tube gets the air from your trachea. Which spreads out into all of the bronchial tubes and goes into your lungs and does it all over again. Then, your bronchus or bronchi gets air and puts it in the left and the right lungs. Your bronchus is a tube that gets air from your bronchial tube and puts it into the lungs. After the air gets into your lungs the air goes through these tiny little branches called bronchioles. Your bronchioles keep splitting into smaller and smaller branches. Finally, when the bronchioles stop spreading out they go into your alveoli. Your alveoli are tiny little air sacks that air was exchanged into. There are about 6 million alveoli in your lungs!
Now we know that the respiratory system is extremely important and without it we would die. Your respiratory system contains really interesting things such as, your lungs can float. As you can see your respiratory system is very important, just like your digestive system!
Digestive System:
Your digestive system helps you break down all of your food to get the nutrients and fibers out and into your cells. Your digestive system has many body parts in it that have to work very hard. Right when you smell something delicious your digestive system starts to work. Your food takes six to eight hours to go through your whole digestive system.
To get everything in your digestive system working you have to use your mouth, teeth, mechanical digestion, saliva, chemical digestion, and tongue. Your mouth takes in the food and right when it enters your mouth your digestive system gets to work. After the food enters your mouth you put your teeth to work. Your teeth break down the food that just entered your mouth to make it easier for your digestive system. This is called mechanical digestion. Mechanical digestion is your teeth chewing your food. Next your tongue tastes the food and starts producing more and more saliva. Your saliva begins to break down the food you just ate. This is called chemical digestion. Then, the food touches the tongue (muscle) which turns the food into a ball. Your tongue is one of the most important muscles in your digestive system. This ball of food is called bolus. Bolus is a big ball of food that is covered in mucus. Bolus has to go all of the way down to the stomach. This is all very important just like your esophagus.
Your esophagus is a really important part of the digestive system. The esophagus is a muscular tube that is connected to the throat. Your esophagus is around 8 inches long and runs further than the heart and the trachea. The esophagus leads down to these two doors that let the food go down into the stomach. In the esophagus peristalsis helps by moving the food down to the stomach. Reverse peristalsis is when the wave like movements of your muscles carries the food up through where it came from (vomiting). Where does your food go after all of this happens though?
Your stomach is a very important part of the digestive system. When all of the food goes into this J shaped organ the food (that came from your esophagus) starts to churn and the stomach breaks down the food that you just swallowed. When your stomach is churning it is using its strong muscles to separate all of the different types of food. Inside the stomach there are digestive juices. Your digestive juices are all separated into different organs. The digestive juices that are in your stomach contain saliva, intestinal juices, and gastric juices. Right before the food exits the stomach it turns into chyme. Chyme is the partially digested food that is in liquid form. Where does all of this food go after the stomach though?
The small intestine is a very long and thin. It sucks up all of the nutrients from the chyme. The small intestine helps your pancreas, gallbladder, and the liver break down food. Inside your small intestine are villi. Your villi are small little finger like things inside your small intestine. Your small intestine like I said before sucks the nutrients into the bloodstream. The walls of the small intestine and absorbs it into the bloodstream to get it to other cells. The pancreas is also a very important part of your digestive system.
Your pancreas makes enzymes that help your whole body digest food better. It also produces a type of hormone. Your pancreatic enzymes break down all of the fats and proteins in your body. Your pancreatic enzymes are a very important part of the digestive system. When the food passes through the pancreas it goes to the liver then the gallbladder.
Your liver and gallbladder are a very important part of the digestive system. Your liver sorts all of the things that are good for your body from your waste. Your liver even turns some of your waste into bile. Next, the waste goes through the gallbladder. Your gallbladder is a small little pouch under the liver. The bile that came from the liver gets stored in the gallbladder. Finally the last thing the the waste goes through is bile. Your bile is fluid that contains cholesterol, bile acids, and water. When the waste is done traveling through the gallbladder and liver it goes to the large intestine.
Your large intestine contains many things that are important. Your actual large intestine sucks most of the water out of your waste and turns it hard. There are many different types of bacteria and germs in the large intestine. When the large intestine sucks up all of the water it pushes it out basically and then the water goes into the bloodstream and travels to the cells that need it. The next stop in our digestive system is the anus. The anus gets the waste that still has some water and bacteria on it and pushes it out.
We now know that the digestive system is a very important part of our body. Your digestive system is a little gross but it is mostly interesting. For example, your food does not need gravity to get the digestive system so if you ate before you did a handstand your food would successfully go to stomach unless reverse peristalsis comes in. The whole digestive system is really cool but the nervous system is very cool too!
Nervous System:
Your nervous system sends messages to and from your brain. Think of your nervous system as a huge highway that is in your body that cars keep going one way then come back the other way. Your whole body would not be able to know when something hurts, feels weird, and when you need to do something in a certain amount of time. When you eat your favorite sandwich or even listen to a conversation your whole nervous system is working on getting information from your brain to the place where it came from.
The human body wouldn’t be able to function well without your brain. Imagine your brain as the computer that controls most of the things in the body. Your brain gets all of the messages from your nerves to react or move a certain way. Your brain made up of many different parts such as the cerebrum, cerebellum, and the Medulla. Your cerebrum is the part of the brain that controls voluntary muscles and movements. Your cerebrum is over half of the brain’s weight. The cerebrum is the part of your memory is stored. Next comes the cerebellum. Your cerebellum is under you cerebrum and smaller then it too. The cerebellum controls your balance and coordination of your muscles. You would not be able to keep your balance without your cerebellum. Your medulla is also a big part of your brain. Your medulla also known as the brainstem is the part of the brain that connects to your spinal cord. It also controls your breathing, heart rate, blood pressure, and when signals leave and enter the brain. Your medulla also controls the digestive system’s activity. The brain is obviously a big part of the nervous system but the brain would not be a big part of the nervous system without nerves and the signal that go through them.
The nerves are a very important part of the nervous system. Your nerves are just like a big highway that goes through your body to tell you when something hurts or when you need to pull or push away. Your nerves also send the signals to your brain that help you do what you do. Next are your sensory nerves. Your sensory nerves are the nerves that tell your brain what is going on around in the world. These nerves come from your 5 senses. (e.g. sight, smell, taste, touch, and hearing). They also send the messages to the brain and down to the spinal cord. After your sensory nerves are your motor nerves. Your motor nerves let the brain control all of our muscles. They let the brain know that they need the muscles to contract and relax so the body can move. Next the spinal cord comes to work. The spinal cord is the main highway for the nerves to send the signals to the brain through. The spinal cord is a very important part of the nervous system. The spinal cord is a very long and important part of the nervous system. Your neurons are the things that send your brain send the signals to help your muscles know when to react a certain way. There are 100 billion neurons in your brain and 13.5 million in your spinal cord. They are a very important part of the human body, just like your synapses. Your synapses are a very important part of the nervous system because they help the nerves send signals to other nerves to send the signal to the brain about what is happening. Your synapses are on the end of the nerve and are very important. Like I said your synapses are very important just like your dendrites. Your dendrites are the branches of nerves that collect the signals from the synapses to tell the nerve what is going on. Your dendrites are the branches of the nerves. Your dendrites are a very important part of the nervous system, just like your axons! Your axons are the part of the nerve that takes the information that the brain needs and takes it away from the soma. They are a big part of the human body because they take the information to the brain. The whole nervous system would not be able to work without the senses or axons!
Your senses are a very important part of the human body because they help detect the taste,smell,touch, and sight of everything you see. Taste is the one sense that something has to enter the body for it to work. The nervous system relates to taste because when the food enters the body your nerves send the brain a message then, the brain sends a signal to the taste buds to start working and taste the food that just entered the body. Taste is a really cool sense to have just like your sight! Sight is a very important part of the nervous system because the optical nerve behind the eye and that is a very important nerve. The optical nerve is an important part of the nervous system because it helps us remember things by picture. Your sight is the most used sense of your 5 senses! As you can see, your sense of sight is a very important sense just like your sense of touch. The sense of touch relates to the nervous system because your nerves send the signal to the brain to make your nerves that are on the top of your fingers to feel the thing you are going to touch. The sense of touch lets you feel the things around you. This is a very important part of the nervous system just like the sense of smell! The sense of smell relates to the nervous system because in the back of the nose there are nerves that smell everything that is around you. Smelling is a very important sense because when the nerves get the aroma it sends it to the Olfactory so the nose can smell it. Hearing is the the last sense I am going to talk about but it definitely not the least! When you hear something it is the nerves in your ear sending the message that was just sent to you to the brain and then the brain knows what the message meant so you respond to the person whom was talking to you. All of the nervous system would not be able to work that well without the 5 senses!
I hope you now know that your nervous system is a big part of the human body. It looks kind of weird but it is really interesting. For example, there are more nerves in the whole human body that the amount of stars in the milky way. As you can see the nervous system is a very big part of the human body and I hope you learned a lot from this essay.
In conclusion, the human body has many systems that each work hard to do specific jobs to benefit our bodies, but they also work together successfully to ensure of us being well. The skeletal system provides support, protection and structure while the muscular system allows us to move, breath, and digest food. The circulatory system transports oxygen and nutrients to the cells of our body while getting rid of waste products and when respiratory system swaps out the oxygen and carbon dioxide. Finally, the digestive system converts food into energy while the nervous system uses that energy to make decisions and maintain memories. I appreciate the time you took to read these essays and hope that you learned something valuable. So the next time you move a muscle or take in a breath, I hope you’ll think about how impressive our human body really is!
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