Cardiovascular System

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Across
  1. 1. 2 lower chambers
  2. 3. muscle middle layer of the heart
  3. 4. the largest artery in teh body
  4. 6. instrument used to measure blood pressure
  5. 9. structure in veins or in the heart that temporarily closes an opening so that blood flows only in one direction
  6. 11. relaxation phase of the heartbeat
  7. 12. 2 upper chambers
  8. 13. pathway of blood from the heart to tissue capillaries and back to the heart
  9. 15. amount of quarts of blood in the body
Down
  1. 1. small vein
  2. 2. contraction phase of the heartbeat
  3. 5. specialized muscle fibers connecting the atria with the ventricles and transmitting electrical impulses
  4. 7. valve positioned between the right ventricle and the pulmonary artery
  5. 8. lower tip of the heart
  6. 10. abnormal swishing sound caused by improper closure of the heart valve
  7. 14. inner lining of the heart