Cardiovascular System

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Across
  1. 4. upper chamber of the heart
  2. 9. wall that separates the right atrium from the left atrium
  3. 10. large vein that carries blood from the lower part of the body
  4. 11. vessel that carries blood away from the heart
  5. 12. blood flow between the heart and body tissues
  6. 13. double-layered sac that surrounds the heart
  7. 14. vessel that carries deoxygenated blood to the heart
Down
  1. 1. lower chamber of the heart
  2. 2. vessel that carries oxygenated blood from the lungs to the heart
  3. 3. smallest vessel and point of passage for nutrients and gases between the bloodstream and cells
  4. 5. small vein
  5. 6. structure that helps blood flow in the right direction by temporarily closing an opening
  6. 7. the average adult has about 5 ____ of blood
  7. 8. structure in between the right atrium and right ventricle that prevents the backflow of blood
  8. 11. largest artery