Across
- 5. brings air into body.
- 9. delivers oxygen through the body.
- 10. extracts nutrients from food.
- 11. provides movement.
Down
- 1. Outer layer.
- 2. The support structure.
- 3. provides offspring.
- 4. provides feelings of pain, etc.
- 6. Controls metabolism.
- 7. assists in homeostasis.
- 8. maintains fluid balance.