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