michael cardiovascular Crossword Puzzle

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Across
  1. 2. blood to/from all body tissues
  2. 6. graphic record of heart activity
  3. 9. cardiac muscle
  4. 11. outer layer
  5. 12. network of tubes
  6. 14. heart function
  7. 16. anchors valve flaps in their closed position
  8. 17. heart is the size of this
  9. 19. high resistance to blood flow
Down
  1. 1. cardiovascular main function
  2. 3. receives blood
  3. 4. events of one heart beat
  4. 5. pump blood out
  5. 7. low pressure
  6. 8. prevent backflow of blood
  7. 10. pacemaker of the heart
  8. 13. endothelium lines chambers
  9. 14. blood to/from lungs
  10. 15. transport vehicle
  11. 18. this organ weights less than a pound