Across
- 1. what you breathe out of your body
- 3. passages that direct air into the lungs
- 6. tissue of the respiratory system
- 11. throat that connects to nose and mouth
- 12. cell of the respiratory system
- 15. what you breathe into your body
Down
- 2. flap that covers the trachea when you swallow food
- 4. where air enters the body and produces mucus
- 5. branch off the bronchi to connect to the alveoli
- 7. windpipe and a pathway for air
- 8. tiny sacs where gas exchange occurs
- 9. tiny hairlike extensions that line the nasal cavity
- 10. major muscle of the respiratory system
- 13. main organ of the respiratory system
- 14. voice box