Across
- 3. the strongest bone in the body that is in the thighs.
- 5. A pathway for both air and food.
- 7. A tiny, grape-like clusters of air sacs in the lungs.
- 11. a smaller networks of tubes deep within the lungs.
- 14. microscopic, thin-walled blood vessels.
Down
- 1. blood vessels that carry oxygenated blood.
- 2. a blood vessel responsible for returning deoxygenated blood.
- 4. A tube that funnels air down towards the lungs.
- 6. an organ that pumps blood
- 8. a bone that supports the head and torso.
- 9. A bone that supports the upper body weight.
- 10. red liquid inside your body.
- 12. the entry points for air.
- 13. a bone that protects the brain.
- 15. a bone cage that protects the heart, lungs and others.