Across
- 3. breathing
- 6. pleura
- 8. cough
- 11. diaphragm
- 12. wall
- 14. bronchus
- 16. bronchus
- 17. mucus
- 18. voice
- 20. bronchiole
- 23. trachea
- 25. blue
- 28. to breathe
- 29. larynx
Down
- 1. sinus
- 2. lung
- 3. spitting
- 4. alveolus
- 5. sac
- 7. epiglottis
- 9. breathing
- 10. protection
- 13. pharynx
- 15. Oxygen
- 19. smell
- 21. lobe
- 22. chest
- 24. carbon dioxide
- 26. air
- 27. to sleep