10.7 crossword puzzle

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Across
  1. 1. Beat of the heart
  2. 5. Abnormal swishing sound
  3. 6. pacemaker of the heart
  4. 7. Inner lining of the heart
  5. 8. Record of electrical activity of heart
  6. 10. One of two upper chambers of the heart
  7. 11. Contraction phase of the heartbeat
  8. 12. Relaxation phase of the heartbeat
  9. 13. Largest type of blood vessel
Down
  1. 1. double layered membrane around heart
  2. 2. One of two lower chambers of the heart
  3. 3. Largest artery in the body
  4. 4. Small vein
  5. 5. Muscular middle layer of the heart
  6. 9. Smallest type of blood vessel