Cardiovascular Crossword Puzzle

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Across
  1. 2. prevent backflow of blood
  2. 6. cardiac muscle
  3. 9. lining of the chambers and valves of the heart
  4. 11. outer layer of the heart
  5. 14. blood cell formation
  6. 15. carries on the signal from the SA Node to the bundle of his
  7. 16. pumps blood out
  8. 17. graphic record of heart activity
  9. 18. uncoordinated shuddering of heart muscles, useless pump
  10. 19. pacemaker of the heart
  11. 20. decrease in oxygen carrying ability of blood
Down
  1. 1. abnormal or unusual heart sounds
  2. 3. clogged coronary vessels
  3. 4. circuit highly resistant to blood flow
  4. 5. Fibers distribute the impulse out to the ventricles
  5. 7. of his Series of "wires” that carry the electrical impulses into the lower chambers through the septum
  6. 8. wall between artia and ventricles
  7. 10. anchors valve flaps in their closed position
  8. 12. lack of adequate blood supply to the heart
  9. 13. receives blood