laying Down


Sitting up


Sit ups


Running in place


Jumping Jacks

20



21


25


31


38

X 4



X 4


X 4


X 4


X4

1 How many bones did your model need?  How many muscles did it 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 needed 2 bones and 2 muscles.

2. In your body muscles only pull.  In our model the "muscles" only pulled too.

3.  Your muscles contract when when they pull the bone.

4.  It wouldn't be able to contract or relax because they would be ripped and ruined.