1.How many bones did your model need?
2.How were your pretend muscles similar to real muscles? Different?
3.What changes occur to the real muscles in the human body to make them pull on bones?
4.What would happen if the ligaments of the models were overstretched or torn? How would it affect the way the models could operate?
1. My model used two bones one fore the humerus and one bone for the ulna and the radius combined. My model needed two muscles, the biceps and the triceps on either side of the upper arm.
2. They were similar because they pulled not pushed like the real thing and they were in the right spots on the "arm".
3. The muscles have to do a thing called contract and release. That means that the muscles have to contract when they are pulling the bone, and they have to release when it is the other muscles turn to pull.
4. If the ligaments of the model was overstretched or torn the bones would not stay together and would be loose. This would be a problem because the elbow would not bend right.