Cardiovascular System

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Across
  1. 3. Node that leads activity for other pacemakers; has 70 AC/min
  2. 5. 88% of blood flows to _____ muscles when exercising
  3. 7. Vessels that carry blood from the heart
  4. 8. Bulk flow into the tissues
  5. 10. Pathway that conducts the pacemaker activity from the right to left atrium
  6. 13. Volume of blood pumped out by each ventricle per beat
  7. 14. Cells that display pacemaker activity and initiate action potentials
  8. 15. Abnormal heart sounds
  9. 17. Valve that does not close completely and causes swishing sound
  10. 21. Valve that does not open completely and causes whistling sound
  11. 23. Blood pressure above 140/90 mm Hg
  12. 25. Phase that results from slow Ca2+ entry coupled with reduced efflux of K+
Down
  1. 1. Tendinous fibers attached to inside edges of AV valves that prevent eversion
  2. 2. External membrane covering the heart and is filled with pericardial fluid to prevent friction
  3. 4. Inability of cardiac output to meet demands of the body
  4. 6. Vessels that carry blood to the heart
  5. 9. Bulk flow into capillaries
  6. 11. Middle layer of heart wall
  7. 12. The second heart sound “dup” comes from the closure of ______ valves
  8. 16. ______ circulation is used by the right ventricle to pump blood to lungs
  9. 18. Pathway that conducts pacemaker activity from SA nodes to AV nodes
  10. 19. ______ circulation is used by the left ventricle to pump blood to body tissues
  11. 20. Relaxation and Filling
  12. 22. Smallest diameter vessels formed when arterioles branch
  13. 24. Contraction and emptying