Cardiovascular System

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Across
  1. 7. The double-walled sac that the heart sits in and contains serous fluid between the layers to prevent friction
  2. 8. What is the first layer of the heart wall?
  3. 10. the pacemaker of the hear
  4. 11. Rapid Heartbeat (over 100 beats per minute)
  5. 13. Heart cells die because of prolonged oxygen deprivation
  6. 14. Top part of the heart that is broad
  7. 15. Set of valves that guards the bases of the 2 large arteries leaving the ventricular chambers
Down
  1. 1. Lack of blood supply to the heart muscle
  2. 2. A rapid uncoordinated shuddering of the heart muscle, a major cause of death in heart attacks
  3. 3. The pointed end of the heart that rests on the diaphragm
  4. 4. Slow Heartbeat (less than 60 beats per minute)
  5. 5. What is the right AV node called?
  6. 6. What is the second layer of the heart wall?
  7. 9. What is the third layer of the heart wall?
  8. 12. How many hollow chambers does the heart has?