Across
- 2. lung
- 4. to breathe
- 6. imperfect
- 9. throat
- 11. voice box
- 14. above
- 15. to revive
- 17. blue
- 19. air sac
- 21. pleural cavity
- 22. lung
Down
- 1. muscle contraction
- 3. epiglottis
- 5. bronchus
- 7. windpipe
- 8. breathing
- 9. voice
- 10. painful
- 12. removal
- 13. good
- 15. nose
- 16. chest
- 18. nose
- 20. oxygen