cardiovascular

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Across
  1. 3. excess (word) causes the heart to become flacid
  2. 4. general vasoconstrictor
  3. 7. hearts own electrical power
  4. 10. prevents restimulation of heart
  5. 11. specialized conductive fibers
  6. 12. ejection of blood
  7. 16. tension on the heart muscle when it begins contraction
  8. 18. speeds rate of SA depolarization
  9. 19. ventricular contraction
  10. 21. sac-like chambers
Down
  1. 1. SBP*HR
  2. 2. changes in vessel diameter
  3. 5. excess (blank) causes heart to go into spastic contraction
  4. 6. heart muscle
  5. 8. (Mechanism)increase in venous return (EDV)increases the amount of blood pumped into theaorta
  6. 9. allows for chemical and electrical coupling between cells
  7. 13. largest blood reservoir
  8. 14. load against which the muscle exerts its contractile force
  9. 15. valve that prevents backflow of blood from the ventricles into the
  10. 17. hearts preferred molecule for energy production
  11. 20. average pressure in the arterial system during the cardiac cycle