Across
- 3. windpipe
- 8. voice box
- 10. flap of tissue that covers the opening of trachea to keep food out
- 11. branch off trachea and transport air into lungs
- 13. air entering body
- 15. substance that moistens air and traps dust particles
- 16. place where air enters the body and is warmed
Down
- 1. air leaving body
- 2. connective tissue in larynx that vibrate to allow speech
- 4. process of cells breaking down glucose, releasing oxygen
- 5. air sacs in lungs
- 6. throat
- 7. process of inhaling oxygen and exhaling carbon dioxide
- 9. dome shaped muscles involved in breathing
- 12. tiny hairlike extensions in the trachea
- 14. main organs of the respiratory system