Cardiovascular System

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Across
  1. 3. hallow muscular organ that pumps blood throughout the heart
  2. 5. force with which the ventricles contract
  3. 6. another name for cardiovascular system
  4. 9. blood vessels that carry blood back to the heart
  5. 10. where substances are exchanged between the blood and body cells
  6. 11. cell fragments that help clot blood
  7. 13. lower chambers of the heart that pump blood OUT of the heart
  8. 15. iron containing protein that binds to oxygen
  9. 16. upper chambers of the heart that receive blood coming INTO the heart
Down
  1. 1. blood vessels that carry blood away from the heart
  2. 2. number of layers of the artery wall
  3. 4. branches that carry blood to the heart
  4. 7. process by which molecules move from an area of higher concentration to lower concentration
  5. 8. sends out signals that make the heart muscle pump
  6. 11. alternating expansion and relaxation of the heart wall
  7. 12. largest artery in the body
  8. 14. liquid part of the blood