Across
- 2. tube that carries air from the nose to the lungs
- 6. respiration that usually happens inside our cells
- 7. vibrates to make sound
- 8. muscle found between the ribs
- 9. oxygen combines with this in the blood
- 12. air that you breathe out
- 14. tiny sacs at the end of the tubes inside the lungs
Down
- 1. slippery membrane surrounding the lungs
- 3. gas that is expired
- 4. muscle that helps move air in and out of the lungs
- 5. tiny blood vessels surrounding the air sacs
- 6. mixture of gases
- 10. gas absorbed by the blood
- 11. turns cloudy if carbon di oxide is present
- 13. exchange of gases happens by this process