Across
- 2. gas that diffuses into the lungs from the bood
- 5. blood vessels in which gas exchange takes place
- 8. air sacs in the lungs where gas exchange takes place
- 9. small airways that branch from bronchi and lead to alveoli
- 12. muscle that makes chest cavity larger and smaller
- 13. process of releasing air from the lungs to the environment
Down
- 1. windpipe
- 3. main airway that branch from the trachea
- 4. process of taking in air from the environment into the lungs
- 6. voice box
- 7. opening to the trachea from the pharynx
- 10. gas that diffuses into the blood from the lungs
- 11. flap that covers the opening to the trachea from the pharynx