Cardio Puzzle

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Across
  1. 2. how waste-filled blood flows back to the heart
  2. 6. middle layer of the heart wall
  3. 8. valve that closes to prevent return of aortic blood to left ventricle
  4. 9. yellow plaque is found within the lining of the artery
  5. 12. upper chamber of heart
  6. 13. partitions that separate the four chambers of the heart
  7. 15. artery that supplies blood to the head and neck
Down
  1. 1. a powerful muscular pump
  2. 3. innermost layer of epithelial cells
  3. 4. carries the blood to the capillaries
  4. 5. artery at the back of the knee
  5. 7. artery found in the foot
  6. 10. flaps of the valves
  7. 11. pathway of blood from the heart to the tissue capillaries and back to the heart
  8. 14. beat of the heart