Across
- 2. where air enters the body
- 5. carries needed substances to the cells and waste away from the cells
- 7. pumps the heart
- 8. flap that covers the trachea during swallowing
- 10. brings oxygenated blood away from the heart
- 11. filters the blood
- 13. area where oxygen and carbon dioxide are exchanged with the blood
- 14. area behind the mouth and nose that serves as a passageway for food and air
Down
- 1. tube that leads to the lungs
- 3. pumps the blood
- 4. muscle that causes the lungs to inflate and deflate
- 6. takes in air and releases waste gas
- 9. brings deoxygenated blood back to the heart
- 12. branches at the base of the trachea