Respiratory System
Across
- 5. bones provide support for soft trachea
- 6. Smooth muscle tissue found in larynx
- 7. Place for human gas exchange
- 8. Breath in
- 10. Help food and air go to the right place
Down
- 1. Protein found in the red blood cells that carries oxygen.
- 2. A small elastic cartilage
- 3. Breath out
- 4. Tunnels allow gas go through
- 9. Where do sound come from?