Across
- 1. restores blood flow and oxygen supply to the body.
- 4. are tiny air sacs that allow for gas exchange.
- 8. carry blood away from the heart, carrying oxygenated blood.
- 9. is the largest artery in the body.
- 12. is the largest vein in the body.
- 13. helps with voice production.
- 14. is air entering the lungs.
- 15. is a pathway for air.
- 17. are the two large tubes that carries air in to the lungs.
Down
- 1. allow oxygen, nutrients, and waste to be exchanged with tissues.
- 2. protects the lungs.
- 3. is the main muscle used for breathing.
- 5. ______lung is smaller to make room for the heart.
- 6. blood is carried through the veins towards the heart.
- 7. separates the heart into the right and left sides.
- 10. causes the diaphragm to relax and move upward.
- 11. is known as the windpipe.
- 16. enters the body through the mouth and nose.