Cardiovascular crossword puzzle

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Across
  1. 2. clot in unbroken blood vessel
  2. 3. blood cell formation
  3. 9. graphic record of heart activity
  4. 12. cardiac muscle
  5. 13. thrombus breaks away from vessel wall and floats freely
  6. 14. outer layer
  7. 17. blood circulates inside closed transport systems
  8. 19. events of one heartbeat
  9. 20. pressure of blood on inner walls of blood vessels
Down
  1. 1. peak of ventricular contraction
  2. 4. artery walls thicken due to fatty deposits
  3. 5. contraction of ventricles
  4. 6. high blood pressure
  5. 7. relaxation of ventricles
  6. 8. uncordinated shuddering of heart muscle
  7. 10. network of tubes
  8. 11. stoppage of bleeding
  9. 15. atria contact
  10. 16. lack of adequate blood supply to the heart
  11. 18. ventricles relax