Heart

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Across
  1. 7. one of two lower chambers
  2. 8. beat of the heart
  3. 9. innermost lining of blood vessels
  4. 10. record of the electrical activity
  5. 11. partition or wall dividing a cavity
  6. 12. largest artery in the body
  7. 13. relaxation phase of the heartbeat
  8. 14. small blood vessel
  9. 15. structure in veins or in the heart
Down
  1. 1. contraction of the heartbeat
  2. 2. blood carrying from the heart to the lungs
  3. 3. gas that enters the blood
  4. 4. small vein
  5. 5. largest vein in the body
  6. 6. abnormal swishing sound
  7. 12. small artery