Across
- 7. separation of the trachea into each lung
- 8. the protection of the lungs
- 10. breathing in
- 11. blood vessels surrounding alveoli
- 12. windpipe
- 13. moistens, cleans and warms the air
- 14. process to replenish the oxygen in the blood
- 16. the site of gas exchange
Down
- 1. voice box
- 2. separation of the bronchi in the lungs
- 3. removed from the blood
- 4. muscles located within the chest walls
- 5. breathing out
- 6. taken into the blood
- 9. dome shaped muscle that sits below the lungs
- 15. section of the system behind the nasal cavity