Across
- 1. These cells make mucus.
- 4. A large ______ ____ provides a large space for gas exchange to happen.
- 8. Carries air into the left and right lungs.
- 11. A cancer causing chemical.
- 13. These can irritate the airways and cause infections, found in cigarette smoke.
- 16. Black, sticky carcinogenics substance in cigarette smoke.
- 17. A concentration _______ is maintained for fast diffusion.
- 18. Breathing out.
- 19. Faster and _____ breathing is needed during exercise.
- 21. These provide the lungs with good blood supply.
- 22. Traps dust and bacteria in the airways.
Down
- 2. Carries air from your mouth into the lungs.
- 3. A gas that binds with haemoglobin in RBCs, preventing carrying around oxygen.
- 5. The structures on ciliated epithelial cells that sweep mucus.
- 6. Where gas exchange takes place in the lungs.
- 7. _______ can be used to test CO2 in expired air.
- 9. A very addictive drug in cigarettes
- 10. _____ surfaces allow gases to dissolve before diffusion.
- 12. The smaller airways in the lungs.
- 14. Breathing in.
- 15. T___ w____ provide a short distance for gases to diffuse.
- 20. Produces vibrations and sound.