Across
- 6. TO MUCH CO2/HYDROGEN IONS
- 9. LOWER RESPIRATORY INFECTION
- 11. CONSTANT GAS EXCHANGE
- 12. FACILITATE GAS EXCHANGE
- 13. SENSE OF SMELL
- 14. HEAD COLD
- 16. BRONCHI
- 17. OUTSIDE THE CHEST CAVITY
- 20. THROAT
- 21. NOT ENOUGH CO2/HYDROGEN IONS
- 22. EXTERNAL GAS EXCHANGE
Down
- 1. PRIMARY CONTROL CENTER
- 2. GRAPE LIKE SACS
- 3. CLOSES LARYNX DURING SWALLOWING/PREVENT CHOKING
- 4. MIDDLE SECTION OF THE THROAT
- 5. NOSTRILS/NOSE
- 7. DRAINS TEARS FROM THE EYES TO NOSTRILS
- 8. GAS EXCHANGE
- 10. TRACHEA
- 15. WITHIN THE CHEST CAVITY
- 18. INTERNAL GAS EXCHANGE
- 19. VOICE BOX