Across
- 1. Carry air to the left and right lungs
- 3. Includes the nose,mouth,pharynx, trachea, and bronchi.
- 6. Your rib muscles ______ to push air out of the lungs when you exhale
- 7. The trachea is made of this in order to keep the airway open
- 8. The system that transfers oxygen throughout your entire body
- 11. It protects your lungs
- 13. to breathe out
Down
- 2. The system that sends neurons through your body to help you breath
- 4. Tiny air sacs in the lungs
- 5. Located at the top of the throat
- 9. to breathe in
- 10. Spongy organs of connective tissue with many airway passages
- 12. The lungs ______ and fill with air when you inhale
- 13. A flap that directs air down the trachea