Questions | Answers |
| 1. Our model needed 3 bones, like any arm. They were the ulna, the radius, and the humerus. The humerus is long, although it wasn't in our joint. The ulna and radius are shorter and thinner. They stay right next to each other, as seen in our joint. Our model needed two muscles, the biceps and the triceps. A normal arm also have these two. The biceps are on top of the arm while the triceps are on the bottom. 2. Our muscles were similar to real muscles because they work the same way. When the biceps contract, they pull the arm up, therefor letting the triceps relax. They are different, though, because although our tendons fade into the bone, the model's tendons abruptly ended when it touched the bone. 3. If the ligaments were overstretched or torn, the whole model would fall apart. The bones would be attached by only the tendons, which would cause the bones to slide right next to each other. 4. Ligaments are long, stretchy strands of tissue that hold bones together at every joint. Cartilage is a spongy material that is in between bones to prevent the two bones from rubbing together. Tendons are the spot where muscle connects to bone. The muscle fades into the bone, going from muscle to solid bone. 5. The thing that made this activity fun was the challenge. It was just awesome that we got to get in touch with our "creative selves" and create something that made sense. 6. This activity was challenging because of the joint. Making a working joint was the hardest part of the model because not only did it have to be done well, but the bones kept on sliding somewhere they shouldn't be. |