Across
- 2. inflates and deflates lungs
- 4. waste product as gas
- 7. air passages inside the lungs
- 8. transports air to bronchus
- 10. what you use to smell and breathe
- 11. small blood vessels
Down
- 1. from high concentration to low
- 3. collects air
- 5. what we breathe
- 6. exchange carbon dioxide inside the lungs
- 7. transports air to the lungs
- 9. protect the chest