Across
- 4. voice box
- 5. dioxide CO2
- 8. chronic obstructive pulmonary disease
- 11. tube for oxygen
- 12. inflammation of the bronchi
- 13. increases the supply of oxygen
- 16. contagious lung disease
Down
- 1. fluid in the lungs
- 2. full inspiration and expiration
- 3. to breathe out
- 6. O2
- 7. nose hairs
- 9. beneath the lungs
- 10. to breathe in
- 14. where is oxygen taken in
- 15. main organ of the respiratory system