Across
- 2. One of the tubes that carry blood from parts of the body back to the heart
- 6. the main organ of the respiratory system
- 9. a waste gas, out of your body
- 11. pumps the oxygen-rich blood out the body
- 12. area in the throat through which air passes to and from the lungs
- 14. large flat muscle that separates the lungs from the stomach area
- 15. commonly called as the voice box
Down
- 1. iron-containing respiratory pigment of vertebrate red blood cells
- 3. where the air first enters the body
- 4. is a passage of airway in the respiratory system
- 5. small tube that carries blood to different parts of a person
- 7. a long tube in your neck and chest carries air into and out of your lungs
- 8. systems of organs functioning in respirations and in humans
- 10. where the passages of the nose connect to your mouth and throat
- 13. a small air-containing compartment of the lungs