cardiovascular system

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Across
  1. 2. Helps regulate blood flow
  2. 3. Cell fragments involved in blood clotting
  3. 4. Largest artery in the body
  4. 6. Carries oxygen-poor blood back to the heart
  5. 8. Relating to the lungs; type of circulation
  6. 11. Fluid that transports oxygen and nutrients
  7. 14. Part of the heart that receives blood
  8. 15. blood cell) Type of cell that carries oxygen
  9. 16. Related to veins
  10. 17. The outer layer of a blood vessel
  11. 18. Smallest blood vessels where exchange occurs
  12. 19. Smallest branches of arteries
Down
  1. 1. The organ that pumps blood
  2. 3. The liquid component of blood
  3. 5. Blood vessels that carry blood away from the heart
  4. 7. Type of circulation that serves the body
  5. 9. The muscular layer of the heart
  6. 10. blood cell) Contains cells that fight infection
  7. 12. Blood vessels that return blood to the heart
  8. 13. The system comprising the heart and blood vessels