Across
- 2. exhaling air out of lungs
- 5. starting process of breathing
- 7. the main organs of respiratory system
- 8. branched passages
- 9. beginning of throat
- 11. breathing air into lungs
- 13. tiny nose hairs
- 14. difficult to breath infection
- 15. increase supply of oxygen
- 16. what we release
Down
- 1. tiny sacs
- 3. what we breathe in
- 4. contagious lung disease
- 6. acute inflammation caused by infection
- 10. coughing up blood
- 12. process of inhaling and exhaling