Across
- 4. the organ system that supports your body
- 5. hard body parts that support your body
- 9. organs that expand to fill with air
- 10. the organ system that moves blood around your body
- 11. type of feet used by sea stars to move
Down
- 1. hard covering on the outside of some animal's bodies
- 2. the organ system that helps your body move
- 3. the organ system that move air into, around, and out of our body
- 6. two tubes that connect to the trachea and to bronchioles
- 7. body parts that work in pairs to help your body move
- 8. pumps blood throughout the body