Crossword Puzzle Challenge Cardiovascular System

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Across
  1. 1. Small vein
  2. 3. smallest type of blood cells transported via veins to the heart.
  3. 5. One of two lower chambers of the heart
  4. 7. Contraction phase of the heartbeat
  5. 8. Muscular middle layer of the heart
  6. 11. Double-layered membrane surrounding the heart
  7. 12. Abnormal swishing sound caused by improper closure of the heart valves
  8. 13. Beat of the heart as felt through the walls of the arteries
  9. 15. small artery
  10. 17. Largest artery in the body
Down
  1. 2. Record of the electrical activity of the heart
  2. 4. Innermost lining of blood vessels
  3. 6. Instrument to measure blood pressure
  4. 9. one of two chambers of the heart.
  5. 10. Relaxation phase of the heartbeat
  6. 14. Structure in veins or in the heart that temporarily closes an opening so that blood flows in only one direction
  7. 16. Inner lining of the heart