Across
- 3. large, fat muscle bottom chest cavity helps breathing
- 4. organs exchange oxygen with water
- 6. iron containing protein
- 9. voice box
- 10. ions enzyme change carbon dioxide into water
- 13. breathing in
- 14. two spongy organs
Down
- 1. liquid part of blood
- 2. smallest blood vessel
- 5. breathing tubes located in abdomen
- 7. breathing out
- 8. throat
- 10. smaller tubular branches of airway
- 11. flap tissue, prevents food from entering
- 12. windpipe