The Heart

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Across
  1. 2. Found between left and right ventricles
  2. 5. Type of systole that forces blood into the ventricles
  3. 7. Node also known as the pacemaker
  4. 9. Relaxation of heart muscle
  5. 10. Prevents backflow of blood into right atrium
  6. 11. Type of circulation in which blood becomes oxygenated
  7. 12. Chamber that pump blood out of the heart
Down
  1. 1. ____ blood is received in right ventricle
  2. 3. The heart is located in the ________
  3. 4. Double epithelium lining surrounding the heart
  4. 6. Number of chambers found in the heart
  5. 8. ______ vena cava transports blood low in oxygen from the body