Across
- 3. extends from the larynx to the bronchi
- 6. tubes from the trachea to the lungs
- 9. contains our vocal chords
- 10. better organ for breathning than a mouth
- 11. sacs where gas exchange occurs
- 12. dioxide a toxic gas
Down
- 1. can be used to breathe and eat
- 2. muscle below lungs
- 4. when we expel air
- 5. when we take in air
- 7. two large sacs used to breathe
- 8. small branches of bronchi
- 13. the gas needed for life