Cardiovascular Crossword Puzzle Review

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Across
  1. 1. contraction of ventricles
  2. 5. Red blood cells
  3. 8. Events of one heartbeat
  4. 11. Abnormally shaped hemoglobin
  5. 12. Ventricles relax
  6. 13. lack of adequate blood supply to the heart
  7. 14. Prevents backflow of blood
  8. 15. bone marrow becomes cancerous
  9. 17. records the electrical activity of the heart
  10. 18. Pacemaker of the heart
  11. 19. blood cell formation
Down
  1. 2. rapid heart rate
  2. 3. very slow heart rate
  3. 4. Ventricles compact
  4. 6. cell fragment
  5. 7. Distributes the impulses out to the ventricles
  6. 9. relaxation of the ventricles
  7. 10. Atria Contract
  8. 16. Receives blood (entryway)
  9. 20. Outer layer of heart