Across
- 2. Muscle that helps you breathe in and out.
- 5. Tiny tubes after the big branches.
- 6. The air tube in your throat.
- 9. Where air goes in first
- 10. Super small blood paths near the air bubbles
- 11. something that your body switches with CO2
Down
- 1. Gas swapping spots.
- 3. Where air goes and gases are swapped.
- 4. Little air bubbles where the swap happens
- 5. Big branches that split into the lungs.
- 7. Bones that guard your lungs and heart
- 8. dioxide