Across
- 2. a soft type of bone where blood cells are made
- 5. The opposite of an endoskeleton
- 6. these bones protects the brain
- 7. This occurs here 2 bones meet
- 8. Muscles work by doing this
- 9. bone is made of this element
Down
- 1. muscles that work in pairs
- 3. one of the uses of the skeleton
- 4. the longest bone in the human body