Across
- 2. this is a muscular organ between the pharynx and trachea
- 5. are pipes that carry oxygen-rich air to your lungs
- 8. these tubes end in bunches of tiny round air sacs
- 9. are the main organs of the respiratory system
- 10. it is a chamber where the passages from the nose and mouth meet.
- 11. are tiny air sacs
- 12. is a waste gas
- 14. deliver blood rich in carbon dioxide
- 15. pumps the oxygen-rich blood out the body
Down
- 1. also filters the air we breathe and branches into the bronchi
- 3. this is where the air first enters our body
- 4. mesh of tiny blood vessels that cover the air sacs
- 6. are two air tubes that branch off of the trachea
- 7. is a group of organs and tissues working together to enable us to breathe
- 13. is a muscular structure located between the thoracic and abdominal cavity