cardiovascular system crossword

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Across
  1. 2. used to listen to the heart
  2. 7. main organ of cardiovascular system
  3. 9. do not resuscitate
  4. 12. prefix meaning heart
  5. 13. where oxygen and nutrients get exchanged
  6. 15. high blood pressure
  7. 16. send electrical signals to help pump heart
  8. 18. biggest artery
  9. 20. rule out
  10. 22. could happen if heart attack goes untreated
  11. 23. sufix meaning involuntary muscle cotraction
  12. 25. beats per minute
Down
  1. 1. blood pressure
  2. 3. condition where heart isn't pumping blood efficiently
  3. 4. uses sound waves to create images of the heart.
  4. 5. blood vessels that carry blood away from heart
  5. 6. condition where veins are swollen often found in legs
  6. 8. used to measure blood preasure
  7. 10. injects x ray dye to look at blood vessels
  8. 11. prefix meaning fast
  9. 14. Inflammation of the protective sac surrounding the heart.
  10. 17. root meaning sound
  11. 19. operating room
  12. 21. blood vessels that carry blood to the heart
  13. 24. root meaning lung