Allison Bradford's MCO203A Crossword Puzzle

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Across
  1. 3. middle layer of the heart.
  2. 5. Lower chamber(s) of the heart.
  3. 6. Partition or wall dividing a cavity.
  4. 8. The body's largest artery.
  5. 10. electronic device put in the chest to stimulate the heart.
  6. 12. Inner lining of the heart.
  7. 14. Abnormal swishing sound caused by improper closure in the heart valves
Down
  1. 1. Gas that enters the blood through the lungs.
  2. 2. vessel that carries blood from body tissues and lungs back to the heart.
  3. 4. Upper chamber(s) of the heart.
  4. 6. contraction of the heartbeat.
  5. 7. Relaxation phase of the heartbeat.
  6. 9. Small artery.
  7. 11. The smallest type of blood vessel.
  8. 13. Beat of the heart