Across
- 1. relaxes during exhalation
- 3. Delivers oxygen to the alveoli
- 7. The process of breathing in
- 10. Move the chest up and out during inhalation
- 12. The gas needed for respiration
Down
- 2. Site of Gaseous Exchange
- 4. The Process of breathing out
- 5. The gas that exits through the lungs.
- 6. Delivers oxygen to each lung.
- 8. Carries oxygen from the nose to the lungs.
- 9. Moistens and Filters the air.
- 11. Protect the lungs