Across
- 1. to breathe in
- 5. this pumps oxygenated blood to your body
- 7. the two tubes that the trachea splits into; these attach to lungs
- 10. The system of the body that deals with breathing
- 11. the nervous system that controls breathing
- 12. the muscle that controls the breathing process
- 13. The air we inhale is made primarily of this
- 14. the two large organs of the respiratory system
Down
- 2. to breathe out
- 3. The air we exhale is made primarily of this
- 4. a protein in blood
- 6. another word for windpipe
- 8. small blood vessels that are wrapped around alveolies
- 9. the thousands of tiny tubes within the lungs