Cardio Puzzle

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Across
  1. 2. upper chamber of the heart
  2. 5. gas(waste)released by body cells
  3. 8. innermost lining of blood vessels
  4. 10. small artery
  5. 12. abnormal swishing sound due to improper closure
  6. 13. smallest type of blood vessel
  7. 14. valve between the left atrium & left ventricle
  8. 15. Instrument to measure blood pressure
Down
  1. 1. relaxation phase of the heart
  2. 3. specialized tissue in the wall in the atria
  3. 4. Partition or wall dividing a cavity
  4. 6. gas that enters the blood through the lungs
  5. 7. beat of the heart
  6. 9. electronic apparatus implanted in the chest to stimulate heart muscle
  7. 11. inner lining of the heart