Across
- 2. Waste product the lungs excrete
- 3. The gas that our body needs to take in
- 6. Air moves into the lungs
- 8. Each bronchus extends into a ___
- 11. Brings oygen to all parts of the body
- 12. Taking in oygen and breathing out carbon dioxide
- 13. Structure that controls our voice
Down
- 1. Made by respiration, all living things need it
- 4. Air moves out of the lungs
- 5. Vessels that surround the alveoli
- 7. Windpipe, carries air from mouth to lungs
- 9. Filters air as it enters the body
- 10. Contracts as you inhale, relaxes as you exhale
- 11. trachea branches into these to ventilate each lung
- 13. two structures inside chest cavity that fill with air