circulatory system

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Across
  1. 2. pumps blood throughout the body
  2. 3. largest artery in the body
  3. 4. alternating expansion & relaxation of an artery wall as blood travels through
  4. 6. blood vessels that carry blood back to the heart
  5. 7. receives blood that comes into the heart
  6. 11. cell fragments that play a role in forming blood clots
  7. 13. sends signals to make the heart contract
  8. 15. wall of tissue that separates right and left side
  9. 16. red blood cell
  10. 17. tiny blood vessels where substances are exchanged between blood and body cells
Down
  1. 1. high blood pressure
  2. 5. pumps blood out of the heart
  3. 8. condition in which blood flow to part of the heart muscle is blocked causing heart cells to die
  4. 9. pressure exerted by blood against the walls of blood vessels
  5. 10. liquid part of blood
  6. 12. iron-containing protein that chemically binds to oxygen molecules
  7. 14. blood vessels that carries blood away from the heart