Across
- 2. muscle that make the inflate and deflate
- 4. what you breath
- 7. small air tubes that connect to the alveoli
- 8. It is the pipe that sends air to the lungs
- 10. what you breath with
- 11. the wall that protects the blood vessels
Down
- 1. movement of gas
- 3. what the air goes in
- 5. how you inhale and exhale
- 6. sir sacks that exchange oxygen
- 7. It is the pipe that sends air to the lungs
- 9. what protects the lungs