Across
- 4. A muscle that helps you breath
- 6. Does the opposite of the pulmonary vein.
- 9. The vocal box of you body.
- 10. A passage where air is purified, humidified and warmed.
- 11. Breathing out
Down
- 1. The tr5achea divides into this.
- 2. We breath out this gas.
- 3. The outer covering of the lungs
- 5. The smallestr of the respiratory branches.
- 6. This carries blood from the lungs to the heart
- 7. Also called air sacs
- 8. Leads from the mouth to the lungs.
- 12. We breath in this gas