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 information about the human body, and YOU WILL TOO if you read my paper! Within this document, you will find six different body system essays including the muscular, skeletal, circulatory, respiratory, digestive, and nervous systems, which all work together to operate our body. All of these systems have different components, each with their own unique functions that help to keep us alive. However, each system cannot operate alone - they need each other to be successful. For example, the nutrients gathered by the digestive system get distributed throughout the body in the circulatory system! Over the previous 12 weeks, we gathered information, organized our thoughts, and paraphrased what trusted websites taught us about each system. We worked with responsibility partners and our papers definitely benefited from the collaboration. Just like each human body system needs to rely on the other systems, we relied on each other to improve our writing and our process. The following is the result of our hard work. Next is our skeletal system and that is part of the reason we can stand.
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 wouldn’t be able to move and our organs wouldn’t 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 callousness (a.k.a. spongy bone). This layer allows are bones to be lightweight and transitions us from compact bone into bone marrow. Bone marrow is a thick and...
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 wouldn’t be able to move and our organs wouldn’t 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 callousness (a.k.a. spongy bone). This layer allows are 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 the 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 wouldn’t be able to move without joints! Joints are places where two or more bones meet. There are several types of bones in our bodies, but we’ll just focus on four of them. The first type of joint is called a hinge 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 a pivot joint. A pivot joint works when one bone acts like a ring and the other bone sits inside the ring and 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 bone which keeps them from rubbing each other which wound be painful. This material is called cartilage. Cartilage, which is bendable can also be found in our ears and bones. But all of this wouldn’t be possible if it weren’t for ligaments holding all 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 around our world!
Bones definitely are important parts of 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!
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 purposes (e.g. movement, pumping blood, dilating your pupils). Some of these purposes are controlled by us, while others are controlled automatically by the muscles or the brain.
There are two types of categories of muscles in the human body: voluntary and involuntary. Voluntary muscles are muscles that we have control over. They are the the muscles that control our body’s and are attached to bones. Skeletal muscles are the only type of voluntary muscles in our body. They pull on bones to cause us to move. Skeletal muscles are the only type of voluntary muscle in our body. They pull on bones to allow us to move. Skeletal muscles never push, they only pull, and that’s why they are nearly almost 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, while the triceps relax or expand. When the triceps want to pull the arm down, they 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 move! Tendons are flexible bands of tissue that blend into bones and enable them to move the bones that they were suppose to move. Although skeletal muscles are the only type of voluntary muscles, there are two different types of involuntary muscles!
Unlike voluntary, involuntary muscles are the muscles the do things automatically without us knowing it. There are two examples of involuntary muscles. They are cardiac muscles and smooth muscle. Cardiac and smooth muscles are similar because they work automatically, by themselves. Cardiac muscles are muscles that are found only in our heart, and are responsible for pumping blood throughout our body. They work without is thinking about them, and they contract and relax throughout our entire lives. Smooth muscles are found inside many of our organs like the intestines, esophagus, stomach, and bladder and help move food through our body. Smooth muscles can also be found in your eyes and blood vessels. Smooth muscles cells may 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 digest 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 our body weight and give our body tone and shape. In the next essay, learn how some of these muscles move throughout our body in order to deliver oxygen to all of our cells.
The circulatory system carries all the blood to your body, and it’s made up of three main parts. First is the heart, it’s responsible for pumping the blood to your, the next one it blood vessels they carry the blood to your body and the last part is blood it carries multiple things to carry to your body. You couldn’t move without your circulatory system because the muscles and the brain needs oxygen and the blood has it but you’re going to learn a lot more about how your blood helps your body.
The circulatory system carries blood throughout your body and the blood is made up of four main things. The first one is red blood cells it carries the oxygen, nutrients, sugar, and hormones, and it takes co2 from the cells, the red blood cells are also have iron in them that makes the blood red when they pick up the waste they take it to your kidneys. Blood also carries platelets and their job is to make a scab over your cut, so let’s say you got an cut and it start bleeding when the blood starts coming the platelets immediately run to the rescue they then connect together to make a net while your body grows the skin. The next thing that’s in your blood is white blood cells and their the ones that fight off infections so if you got a cut germs can get in and that’s where the white blood cells come in they morph to the shape of the germ then they connect to it and they tear it apart and eat in. The thing that takes up most of your blood is plasma and that is the liquid in your blood, if you didn’t have it all the materials in your blood would just sit there because it would have anything to flow in. Those are the materials in your blood that are a big part of your survival, but the blood has to travel in something and that it blood vessels.
Blood vessels are what the blood travels in there are many different blood vessels, blood vessels can be blue or red based on the red blood cells in them, of they can be big or small, here are some of the blood vessels. The first blood vessel is arteries, arteries carry blood away from the heart which makes them red because the blood in them has oxygen, the branch off to all the parts of your body to deliver oxygen, to the parts of the body, even the skin. The next one is veins, they pretty much do the opposite of arteries, because the take the deoxygenated blood away from where ever it was and delivers it to to the lungs and that’s what you breath out, they are blue because they carry co2 instead of oxygen. The last one is a capillary, a capillary is the transformation of arteries to veins, and it makes the exchange between oxygen and co2, it looks like a big net, and they are everywhere in your body,and they are small and thin. Those are the reason the blood travels to its designated place, but the reason it gets there is because of the heart.
The heart is made up of four chambers and they work in pairs, one of them pumps deoxygenated blood to the heart, and the other one pumps oxygenated blood to the body. The first two chambers pump the deoxygenated blood to the lungs and one of those two pairs is the right atrium and that is a holding chamber for the right ventricle, while the right ventricle is pumping blood to the body the right atrium is holding the blood for the right ventricle them pumps it to the right ventricle. The right ventricle pumps the deoxygenated blood to the lungs. On the other side of the heart is the left atrium and the left ventricle, they do the same thing as the right atrium and the right ventricle, but instead they pump oxygenated blood to the body. The holding chamber for the left ventricle is the left atrium and it’s bigger than the right atrium. It holds all the blood coming from the lungs and stores it for a short period of time before it pumps it to the left ventricle. The left ventricle is the pump to the whole body and it is the thickest chamber because of all the muscles surrounding it. It is the strongest chamber of the heart. Without the heart the circulatory system wouldn’t have any blood flow so you need the heart to run the system.
So the circulatory is a big part of your body and it does more than you think it does when you look a your blood vessels. You need so much blood that it takes up seven percent of your body weight and your blood vessels run for miles if you stretched them all out, but none of this would be possible if it wasn’t for your respiratory system.
The Respiratory System is the home for your lungs and your airway and it’s responsible for supplying your blood with oxygen and taking out the co2 from your body. But there is more than you think that is part of the Respiratory System.
The Respiratory System has two main parts, the lungs, and the airway. Let’s start out with the airway, the airway is how air gets into your lungs, first it has to get into your body so it goes through the mouth or nose, they connect to each other so you can breathe through both because if you imagine you had a cold and you could only breathe through your nose, it could possibly be deadly. The nose and mouth then lead to the epiglottis which is in the back of your throat, and the epiglottis keeps you from choking because when you swallow food that goes back and covers your larynx so you don’t choke. The first part of your airway is the larynx, the larynx also helps hold out the food too, the most important part of your larynx is the voice box and the vocal cords. The vocal cords is the reason you can make sounds, when you breathe out your vocal cords open or contract depending on what sound you want to make. The voice box is around the vocal cords and protects them. The trachea is the last part of the airway that leads to the branches of the lungs. That is how the air gets into the lungs but next you’ll learn what happens when the air gets to the lungs.
The lungs is where all the action takes place, but for that to happen the air needs to get in and out of the lungs first. What makes that happen is the diaphragm, the diaphragm is the big muscles that pushes out when you breathe out and relaxes when you breathe in, if you didn’t have the diaphragm you couldn't breathe in or out, but the diaphragm wouldn’t be any help if you didn’t have lungs. Next is the lungs, they really don’t do anything, but all they is just hold in air, but other than that they don’t really do anything. But what does something in the lungs is bronchial tube, the bronchial tube is what the air travels into get where it needs and where the co2 passes through to get breathed out. The next thing that the air passes through is the bronchus which just splits off, from the bronchial tube to get the air everywhere in the lungs so the lungs can deliver the most oxygen and get the most co2 out of your body. Finally the smallest branch that it splits of into is the Bronchioles which is the last place that air travels to, to get where it needs to be which is the alveoli. The alveoli is where it all happens it’s where the co2 gets of the red blood cells and the oxygen gets on the red blood cells and gets pumped to the rest of the body, but how this happens is there is one capillary on each alveoli so the deoxygenated blood can get oxygenated and go to the heart.
So now next time you breathe in you know what happens is your Respiratory System, and how it connects with all the other system because the Respiratory System couldn’t work without all the other systems, next is the Digestive System.
The digestive system is very important because it uses the nutrients from the food to put it in your blood stream to be pumped out to the rest of your body. But it has to go through more than the stomach, it takes about 8 hours to go through the digestive system. The stomach has many acids that helps break the food down so it can go through the small intestines so the nutrients can get absorbed.
The digestive system start out with the mouth, the main purpose of the mouth is to chew the food down so you can swallow it and not choke. Your saliva is what lubricates your food down enough to be swallowed, and it also protects your teeth from beginning to decay, you have saliva glands so when you smell food the saliva starts to make your mouth water. Your saliva comes from saliva glands located at the top of your mouth. Next is the tongue, the tongue is what allows you to taste because it is covered in taste buds so if your food never touched your tongue you would never be able to taste the food that you are eating. It is also covered with little hairs that give it it’s texture. At the point that the food gets swallowed it is called bolus, bolus is the food after it got chewed up and reacted to the saliva and is at the point of swallowing and going down the esophagus. It is called bolus until it reaches the stomach and mixes with the stomach juices. The esophagus is the tube that it goes down to reach the liver and the stomach the esophagus is about eight inches long. The esophagus uses muscles to take the food to the liver and the stomach. The food hasn't even done anything good for the yet! But when it reaches the small intestines it will have done a lot of good, unless it’s unhealthy.
Next is the place where the food gets stored and that is called the stomach and that is where it gets stored and if it wasn't for your stomach you would have to eat a lot more than a couple times a day, and the stomach also has acids that break down the food and it also sanitizes it. Next is the digestive juices they are all the liquid that are used in the digestive system like the saliva, or bile they all play different role in the digestion, there are glands in the stomach that release the digestive juices. The thing that the stomach makes from the food is chyme it is the partly digested food that is about to go into the small intestines. The small intestines are what takes out 90% the nutrients from the food and the are about ten feet long and 1 inch in diameter, the food gets smeared all over the walls of the small intestine so the nutrients can get absorbed. The villi is the little hair covering the small intestine they are the ones that absorb the nutrients from the food, the small intestine wouldn’t do anything because the villi do everything besides keep the food in. The villi has to let the nutrients in and it does that by the material of the surface, it only allows certain substances like nutrients to pass through not the food itself, under the villi is capillaries and so the nutrients gets into the blood and goes where it needs to go. The next thing that almost does the same thing as the villi is the pancreas and it’s job is to turn the food we eat into fuel for are cells, but it has 2 other jobs and they are, to help the digestion by holding some digestive juices, and it also controls the blood sugar. The liquids that it holds breaks down fats, and proteins, but it realises about 8 cups of pancreatic enzymes into the beginning of the small intestine, it also help neutralize the stomach acid near the small intestine. The liver is a very big organ and it has many jobs like is has to clean out the blood from bad bacteria, the liver also stores glycogen and glycogen is energy in the form of sugar, and the liver also produces bile. The gallbladder is what holds bile and it sit right below the liver and feeds the bile to the liver so it can be released to the stomach and small intestine. Bile is an acid that breaks fats and it also breaks down bilirubin, you need bile to live so even though it may do a little job it is essential to your health. There is another intestine after the small intestine and that is the large intestine, the large intestine it where the food goes when it has no more use for the body, but the food is still wet and that is what the large intestine’s job is, it takes out all the water and that makes it look like what comes out. But the poop has to come out somewhere and that is what the anus does, the anus it at the end of the large intestine and it is controlled by an involuntary muscle and a voluntary muscle, and when you push it opens up and when you relax it closes up.
You have now learned what happens in the digestive system and the role that it plays in, how it keeps you alive, and all the systems help the other ones in some way like the nutrients that the digestive system collects gets transferred into the circulatory system. But how do you feel?, like if someone hits you, well that the job of the nervous system.
The brain is the main part of your nervous system and it controls most of your body and it controls your mood, muscle movements, decision making, dreams, tiredness, pain, sight, smell, taste, thinking, memory, and a bunch of other things but different parts of the brain control them. The brain is made up of nervous tissue that is pink on the outside and white on the inside, our brain also controls the flight or fight response which is to decide to run or fight the danger. Next is the cerebrum is the a part of your brain and controls your thinking, memory, the cerebrum makes up most of your brain and is the most superior part of the brain. The next part of the brain is the cerebellum, it is located at the end of the brain in the bottom in the bottom of it, it sits right above the spinal cord and that makes it easy to collect the nerve messages and send the to their designated area in the brain. Next is the medulla or brainstem, it is extremely important because it controls the movements of your involuntary muscles movements, but if you didn’t have the medulla you would have to keep thinking ‘heartbeat, breathe, heartbeat, breathe’ because if you stop thinking about doing that you would die. The other thing that the medulla controls is when you vomit, sneeze, coughing, and swallow. Now we have learned about the brain but we still have to learn about the other big part of the nervous system, the nerves.
The next part of your nervous system is the nerves, they are responsible for communicating with the rest of your body, like if you want to move your arm your brain sends a message to your arm muscle to tell it to move. The next thing that nerves do is touch, they let you know if something is hot, cold, smooth, rough, hard, soft, and so on, how the nerves do this is when you touch something hot with your hand the nerves in your hand send a message up to your brain to decide what to do, so in this case the brain would say to move your hand away, so the brain sends a message down to your hand muscles to tell them to pull your hand away and all this happens in a matter of 1 or 2 milliseconds, but you have different kinds of nerves that do different things and that what you're about to learn about. The first nerve that were going to learn about is sensory nerves, they are the nerves that send messages of pain and comfort to the Central Nervous System then from there it sends it to the brain to process the messages then to send them back down to the sensory nerves again to make a reaction. Next is the motor nerves and they are located in the Central Nervous System and their job is to make the muscles contract or relax and they are very important because if you didn't have them your muscles would be useless. Next is the Central Nervous system and also called the Spinal Cord, it is located in an around your spine and it revives all the messages from all the nerves in your body and sends them up to the brain to process them and then the brain sends the new messages down the Spinal Cord and down to the nerves that sent them, the spinal cord is very important because if you didn't have you would die but if someone didn't have it and they were some how living they wouldn't feel pain they couldn't move their body and pretty much and anything like that. The next thing that we our going to learn about is the Neurons and they are cells that our located in your brain to revive the messages from the Central Nervous System, and then they will send the message back down through the Central Nervous System (Same thing that I talked about in the Spinal Cord.) They are important because if you didn't have them and you stuck the your hand on a burning hot stove you would feel it but you wouldn't know to pull it away so it would still be there. There is a little line that goes to one Neuron to the next Neuron to the next and the next ect., and these are called Synapses, we have them because they let nerve messages travel from on Neuron to the other. Inside the Neuron there are two things that make it up and they are Dendrites and Axons, Dendrites are the thing that receives the electrical messages that indicate if we are hurt or something like that, and Axons send the electrical messages away from the Neuron when the Neuron doesn't need it any more.
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 our well-being. The skeletal system provides support, protection and structure while the muscular system allows us to move, breathe, and digest food. The circulatory system transports oxygen and nutrients to the cells of our body while getting rid of waste products and the 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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Although bones are extremely important, we wouldn’t be able to move without joints! Joints are places where two or more bones meet. There are several types of bones in our bodies, but we’ll just focus on four of them. The first type of joint is called a hinge 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 a pivot joint. A pivot joint works when one bone acts like a ring and the other bone sits inside the ring and 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 bone which keeps them from rubbing each other which wound be painful. This material is called cartilage. Cartilage, which is bendable can also be found in our ears and bones. But all of this wouldn’t be possible if it weren’t for ligaments holding all 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 around our world!
Bones definitely are important parts of 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!
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 purposes (e.g. movement, pumping blood, dilating your pupils). Some of these purposes are controlled by us, while others are controlled automatically by the muscles or the brain.
There are two types of categories of muscles in the human body: voluntary and involuntary. Voluntary muscles are muscles that we have control over. They are the the muscles that control our body’s and are attached to bones. Skeletal muscles are the only type of voluntary muscles in our body. They pull on bones to cause us to move. Skeletal muscles are the only type of voluntary muscle in our body. They pull on bones to allow us to move. Skeletal muscles never push, they only pull, and that’s why they are nearly almost 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, while the triceps relax or expand. When the triceps want to pull the arm down, they 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 move! Tendons are flexible bands of tissue that blend into bones and enable them to move the bones that they were suppose to move. Although skeletal muscles are the only type of voluntary muscles, there are two different types of involuntary muscles!
Unlike voluntary, involuntary muscles are the muscles the do things automatically without us knowing it. There are two examples of involuntary muscles. They are cardiac muscles and smooth muscle. Cardiac and smooth muscles are similar because they work automatically, by themselves. Cardiac muscles are muscles that are found only in our heart, and are responsible for pumping blood throughout our body. They work without is thinking about them, and they contract and relax throughout our entire lives. Smooth muscles are found inside many of our organs like the intestines, esophagus, stomach, and bladder and help move food through our body. Smooth muscles can also be found in your eyes and blood vessels. Smooth muscles cells may 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 digest 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 our body weight and give our body tone and shape. In the next essay, learn how some of these muscles move throughout our body in order to deliver oxygen to all of our cells.
The circulatory system carries all the blood to your body, and it’s made up of three main parts. First is the heart, it’s responsible for pumping the blood to your, the next one it blood vessels they carry the blood to your body and the last part is blood it carries multiple things to carry to your body. You couldn’t move without your circulatory system because the muscles and the brain needs oxygen and the blood has it but you’re going to learn a lot more about how your blood helps your body.
The circulatory system carries blood throughout your body and the blood is made up of four main things. The first one is red blood cells it carries the oxygen, nutrients, sugar, and hormones, and it takes co2 from the cells, the red blood cells are also have iron in them that makes the blood red when they pick up the waste they take it to your kidneys. Blood also carries platelets and their job is to make a scab over your cut, so let’s say you got an cut and it start bleeding when the blood starts coming the platelets immediately run to the rescue they then connect together to make a net while your body grows the skin. The next thing that’s in your blood is white blood cells and their the ones that fight off infections so if you got a cut germs can get in and that’s where the white blood cells come in they morph to the shape of the germ then they connect to it and they tear it apart and eat in. The thing that takes up most of your blood is plasma and that is the liquid in your blood, if you didn’t have it all the materials in your blood would just sit there because it would have anything to flow in. Those are the materials in your blood that are a big part of your survival, but the blood has to travel in something and that it blood vessels.
Blood vessels are what the blood travels in there are many different blood vessels, blood vessels can be blue or red based on the red blood cells in them, of they can be big or small, here are some of the blood vessels. The first blood vessel is arteries, arteries carry blood away from the heart which makes them red because the blood in them has oxygen, the branch off to all the parts of your body to deliver oxygen, to the parts of the body, even the skin. The next one is veins, they pretty much do the opposite of arteries, because the take the deoxygenated blood away from where ever it was and delivers it to to the lungs and that’s what you breath out, they are blue because they carry co2 instead of oxygen. The last one is a capillary, a capillary is the transformation of arteries to veins, and it makes the exchange between oxygen and co2, it looks like a big net, and they are everywhere in your body,and they are small and thin. Those are the reason the blood travels to its designated place, but the reason it gets there is because of the heart.
The heart is made up of four chambers and they work in pairs, one of them pumps deoxygenated blood to the heart, and the other one pumps oxygenated blood to the body. The first two chambers pump the deoxygenated blood to the lungs and one of those two pairs is the right atrium and that is a holding chamber for the right ventricle, while the right ventricle is pumping blood to the body the right atrium is holding the blood for the right ventricle them pumps it to the right ventricle. The right ventricle pumps the deoxygenated blood to the lungs. On the other side of the heart is the left atrium and the left ventricle, they do the same thing as the right atrium and the right ventricle, but instead they pump oxygenated blood to the body. The holding chamber for the left ventricle is the left atrium and it’s bigger than the right atrium. It holds all the blood coming from the lungs and stores it for a short period of time before it pumps it to the left ventricle. The left ventricle is the pump to the whole body and it is the thickest chamber because of all the muscles surrounding it. It is the strongest chamber of the heart. Without the heart the circulatory system wouldn’t have any blood flow so you need the heart to run the system.
So the circulatory is a big part of your body and it does more than you think it does when you look a your blood vessels. You need so much blood that it takes up seven percent of your body weight and your blood vessels run for miles if you stretched them all out, but none of this would be possible if it wasn’t for your respiratory system.
The Respiratory System is the home for your lungs and your airway and it’s responsible for supplying your blood with oxygen and taking out the co2 from your body. But there is more than you think that is part of the Respiratory System.
The Respiratory System has two main parts, the lungs, and the airway. Let’s start out with the airway, the airway is how air gets into your lungs, first it has to get into your body so it goes through the mouth or nose, they connect to each other so you can breathe through both because if you imagine you had a cold and you could only breathe through your nose, it could possibly be deadly. The nose and mouth then lead to the epiglottis which is in the back of your throat, and the epiglottis keeps you from choking because when you swallow food that goes back and covers your larynx so you don’t choke. The first part of your airway is the larynx, the larynx also helps hold out the food too, the most important part of your larynx is the voice box and the vocal cords. The vocal cords is the reason you can make sounds, when you breathe out your vocal cords open or contract depending on what sound you want to make. The voice box is around the vocal cords and protects them. The trachea is the last part of the airway that leads to the branches of the lungs. That is how the air gets into the lungs but next you’ll learn what happens when the air gets to the lungs.
The lungs is where all the action takes place, but for that to happen the air needs to get in and out of the lungs first. What makes that happen is the diaphragm, the diaphragm is the big muscles that pushes out when you breathe out and relaxes when you breathe in, if you didn’t have the diaphragm you couldn't breathe in or out, but the diaphragm wouldn’t be any help if you didn’t have lungs. Next is the lungs, they really don’t do anything, but all they is just hold in air, but other than that they don’t really do anything. But what does something in the lungs is bronchial tube, the bronchial tube is what the air travels into get where it needs and where the co2 passes through to get breathed out. The next thing that the air passes through is the bronchus which just splits off, from the bronchial tube to get the air everywhere in the lungs so the lungs can deliver the most oxygen and get the most co2 out of your body. Finally the smallest branch that it splits of into is the Bronchioles which is the last place that air travels to, to get where it needs to be which is the alveoli. The alveoli is where it all happens it’s where the co2 gets of the red blood cells and the oxygen gets on the red blood cells and gets pumped to the rest of the body, but how this happens is there is one capillary on each alveoli so the deoxygenated blood can get oxygenated and go to the heart.
So now next time you breathe in you know what happens is your Respiratory System, and how it connects with all the other system because the Respiratory System couldn’t work without all the other systems, next is the Digestive System.
The digestive system is very important because it uses the nutrients from the food to put it in your blood stream to be pumped out to the rest of your body. But it has to go through more than the stomach, it takes about 8 hours to go through the digestive system. The stomach has many acids that helps break the food down so it can go through the small intestines so the nutrients can get absorbed.
The digestive system start out with the mouth, the main purpose of the mouth is to chew the food down so you can swallow it and not choke. Your saliva is what lubricates your food down enough to be swallowed, and it also protects your teeth from beginning to decay, you have saliva glands so when you smell food the saliva starts to make your mouth water. Your saliva comes from saliva glands located at the top of your mouth. Next is the tongue, the tongue is what allows you to taste because it is covered in taste buds so if your food never touched your tongue you would never be able to taste the food that you are eating. It is also covered with little hairs that give it it’s texture. At the point that the food gets swallowed it is called bolus, bolus is the food after it got chewed up and reacted to the saliva and is at the point of swallowing and going down the esophagus. It is called bolus until it reaches the stomach and mixes with the stomach juices. The esophagus is the tube that it goes down to reach the liver and the stomach the esophagus is about eight inches long. The esophagus uses muscles to take the food to the liver and the stomach. The food hasn't even done anything good for the yet! But when it reaches the small intestines it will have done a lot of good, unless it’s unhealthy.
Next is the place where the food gets stored and that is called the stomach and that is where it gets stored and if it wasn't for your stomach you would have to eat a lot more than a couple times a day, and the stomach also has acids that break down the food and it also sanitizes it. Next is the digestive juices they are all the liquid that are used in the digestive system like the saliva, or bile they all play different role in the digestion, there are glands in the stomach that release the digestive juices. The thing that the stomach makes from the food is chyme it is the partly digested food that is about to go into the small intestines. The small intestines are what takes out 90% the nutrients from the food and the are about ten feet long and 1 inch in diameter, the food gets smeared all over the walls of the small intestine so the nutrients can get absorbed. The villi is the little hair covering the small intestine they are the ones that absorb the nutrients from the food, the small intestine wouldn’t do anything because the villi do everything besides keep the food in. The villi has to let the nutrients in and it does that by the material of the surface, it only allows certain substances like nutrients to pass through not the food itself, under the villi is capillaries and so the nutrients gets into the blood and goes where it needs to go. The next thing that almost does the same thing as the villi is the pancreas and it’s job is to turn the food we eat into fuel for are cells, but it has 2 other jobs and they are, to help the digestion by holding some digestive juices, and it also controls the blood sugar. The liquids that it holds breaks down fats, and proteins, but it realises about 8 cups of pancreatic enzymes into the beginning of the small intestine, it also help neutralize the stomach acid near the small intestine. The liver is a very big organ and it has many jobs like is has to clean out the blood from bad bacteria, the liver also stores glycogen and glycogen is energy in the form of sugar, and the liver also produces bile. The gallbladder is what holds bile and it sit right below the liver and feeds the bile to the liver so it can be released to the stomach and small intestine. Bile is an acid that breaks fats and it also breaks down bilirubin, you need bile to live so even though it may do a little job it is essential to your health. There is another intestine after the small intestine and that is the large intestine, the large intestine it where the food goes when it has no more use for the body, but the food is still wet and that is what the large intestine’s job is, it takes out all the water and that makes it look like what comes out. But the poop has to come out somewhere and that is what the anus does, the anus it at the end of the large intestine and it is controlled by an involuntary muscle and a voluntary muscle, and when you push it opens up and when you relax it closes up.
You have now learned what happens in the digestive system and the role that it plays in, how it keeps you alive, and all the systems help the other ones in some way like the nutrients that the digestive system collects gets transferred into the circulatory system. But how do you feel?, like if someone hits you, well that the job of the nervous system.
The brain is the main part of your nervous system and it controls most of your body and it controls your mood, muscle movements, decision making, dreams, tiredness, pain, sight, smell, taste, thinking, memory, and a bunch of other things but different parts of the brain control them. The brain is made up of nervous tissue that is pink on the outside and white on the inside, our brain also controls the flight or fight response which is to decide to run or fight the danger. Next is the cerebrum is the a part of your brain and controls your thinking, memory, the cerebrum makes up most of your brain and is the most superior part of the brain. The next part of the brain is the cerebellum, it is located at the end of the brain in the bottom in the bottom of it, it sits right above the spinal cord and that makes it easy to collect the nerve messages and send the to their designated area in the brain. Next is the medulla or brainstem, it is extremely important because it controls the movements of your involuntary muscles movements, but if you didn’t have the medulla you would have to keep thinking ‘heartbeat, breathe, heartbeat, breathe’ because if you stop thinking about doing that you would die. The other thing that the medulla controls is when you vomit, sneeze, coughing, and swallow. Now we have learned about the brain but we still have to learn about the other big part of the nervous system, the nerves.
The next part of your nervous system is the nerves, they are responsible for communicating with the rest of your body, like if you want to move your arm your brain sends a message to your arm muscle to tell it to move. The next thing that nerves do is touch, they let you know if something is hot, cold, smooth, rough, hard, soft, and so on, how the nerves do this is when you touch something hot with your hand the nerves in your hand send a message up to your brain to decide what to do, so in this case the brain would say to move your hand away, so the brain sends a message down to your hand muscles to tell them to pull your hand away and all this happens in a matter of 1 or 2 milliseconds, but you have different kinds of nerves that do different things and that what you're about to learn about. The first nerve that were going to learn about is sensory nerves, they are the nerves that send messages of pain and comfort to the Central Nervous System then from there it sends it to the brain to process the messages then to send them back down to the sensory nerves again to make a reaction. Next is the motor nerves and they are located in the Central Nervous System and their job is to make the muscles contract or relax and they are very important because if you didn't have them your muscles would be useless. Next is the Central Nervous system and also called the Spinal Cord, it is located in an around your spine and it revives all the messages from all the nerves in your body and sends them up to the brain to process them and then the brain sends the new messages down the Spinal Cord and down to the nerves that sent them, the spinal cord is very important because if you didn't have you would die but if someone didn't have it and they were some how living they wouldn't feel pain they couldn't move their body and pretty much and anything like that. The next thing that we our going to learn about is the Neurons and they are cells that our located in your brain to revive the messages from the Central Nervous System, and then they will send the message back down through the Central Nervous System (Same thing that I talked about in the Spinal Cord.) They are important because if you didn't have them and you stuck the your hand on a burning hot stove you would feel it but you wouldn't know to pull it away so it would still be there. There is a little line that goes to one Neuron to the next Neuron to the next and the next ect., and these are called Synapses, we have them because they let nerve messages travel from on Neuron to the other. Inside the Neuron there are two things that make it up and they are Dendrites and Axons, Dendrites are the thing that receives the electrical messages that indicate if we are hurt or something like that, and Axons send the electrical messages away from the Neuron when the Neuron doesn't need it any more.
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 our well-being. The skeletal system provides support, protection and structure while the muscular system allows us to move, breathe, and digest food. The circulatory system transports oxygen and nutrients to the cells of our body while getting rid of waste products and the 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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