Across
- 2. The fine tubes ending in alveoli
- 4. Air enters here
- 6. The chest cavity reduces in size for this
- 8. How thick the alveoli are
- 10. Moves from alveoli to blood
- 11. Gases moving from a high to low concentration
- 12. Gas exchange happen here
- 13. Branch into each lung
- 14. Contracts and moves down when inhaling
Down
- 1. Carries air from the mouth to the bronchi
- 3. The location of alveoli
- 5. Moves from blood to alveoli
- 7. Helps gases diffuse
- 9. Very small blood vessel