Across
- 3. breath
- 6. wall, fence
- 8. neck
- 12. throat
- 13. pneumat- air, lung
- 14. pus
- 17. oxi- oxygen
- 18. - air-filled sacs (in the lungs)
- 20. voice
- 22. diaphragm, mind
Down
- 1. narrow
- 2. hollow space
- 4. hemat- blood
- 5. side, rib
- 7. shaped like a top
- 9. blue
- 10. pulmon- lung
- 11. voice
- 15. chest
- 16. incomplete
- 19. nas- nose
- 21. bronchi- branch