Across
- 2. made of C-shaped rings of cartilage
- 4. moistens and warms air
- 6. brings air into lungs
- 8. scattered goblet cells
- 11. contracts to help with respiration
- 12. hormone released to relax muscles
- 13. air we breathe in
- 14. attaches to hyoid bone
- 15. tissue that covers the larynx when swallowing food
Down
- 1. flattened sac of serous membrane
- 3. air we breathe out
- 5. carry air into alveoli
- 7. contains 3 lobes in right, 2 lobes in left
- 9. main site for gas exchange
- 10. passageway for food and air