The Respiratory System
Across
- 2. the muscle below your lungs that assists them to breathe
- 3. the part of the body that directs air from the mouth to the lungs
- 8. physical inhalation of oxygen and exhalation of carbon dioxide
- 11. air sacs in the lungs
- 12. the muscles within your ribs that help assist with breathing
- 15. main organ of the respiratory system; there are two of them
Down
- 1. the gas we breathe out
- 4. another word for breathing in
- 5. the boney compartments surrounding your lungs
- 6. the chemical process in cells where oxygen enters them
- 7. another word for breathing out
- 9. one of the body parts where oxygen enters your body
- 10. branches within the lungs
- 13. the tube going from the mouth down to the lungs
- 14. the gas we breathe in