Across
- 3. a small blood cell that helps the blood to clot
- 5. the largest artery in the body
- 7. body system that includes the heart,blood vessels,and blood
- 8. the lower chambers of the heart
- 11. a blood cell that fights disease
- 14. structures that open and close to control blood flow throught the heart
- 15. a blood vessel that carries blood to the heart
Down
- 1. a blood cell that carries oxygen
- 2. the vein that carries blood from the lungs to the left atrium
- 4. a blood vessel that carries blood away from the heart
- 6. the two upper chambers of the heart
- 9. is blood blue?
- 10. a tube through which the blood flows
- 12. the muscular organ that pumps blood throughout the body
- 13. a tiny blood vessel that connects arteries to veins