Across
- 2. To breathe in
- 4. Muscle that helps breathe
- 6. Here there are our vocal cords
- 9. Air tubes smaller than bronchi inside the lungs
- 10. It's essential for life
- 12. To breathe out
- 15. It's a waste gas
- 16. Spasms of the diaphragm
Down
- 1. The passage by which air reaches a person's lungs
- 3. Group of tissue
- 5. Group of organs
- 7. It protects the lungs
- 8. It flows through our veins and arteries
- 9. Trachea divides into two air tubes called..
- 11. It's a tube that delivers air from your mouth and nose to the trachea
- 13. Where the exchange of oxygen and carbon dioxide takes place
- 14. Hollow areas