Across
- 1. give strength to the trachea, keeping it open
- 4. What gas diffuses into the alveoli from the bloodstream?
- 7. Air sacs at the end of the bronchioli
- 8. The voice box
- 10. Hair like structures in the trachea to help trap dust
- 13. The process of breathing out
- 15. What gas diffuses into the bloodstream from the alveoli?
- 17. Move up and out during inhalation
- 19. Also known as the windpipe
- 20. Air enter the body via the ______.
- 21. During exhalation, the diaphragm and intercostal muscles _____.
Down
- 2. Muscles between the ribs
- 3. During inhalation, the diaphragm and intercostal muscles ________.
- 5. The process of breathing in
- 6. The process that occurs in the alveoli
- 9. We exhale carbon dioxide and _______ vapour.
- 11. Ribs _________ our lungs and heart
- 12. One bronchus, two __________
- 14. Present in the nose to help trap dust and bacteria
- 16. Sheet of muscle under the lungs
- 18. Vocal chords vibrate to generate _______.