The Circulatory System

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Across
  1. 4. Tricuspid valve
  2. 5. Universal blood donor
  3. 12. Listening to heart sound via stethoscope
  4. 13. Universal blood recipients
  5. 15. Aortic valve
  6. 16. Bicuspid valve
  7. 17. Carry blood away from the heart
  8. 18. The receiving chambers
  9. 20. The heart muscle itself
  10. 21. Thin outer layer
Down
  1. 1. Period between the start of one heart beat
  2. 2. Pulmonary valve
  3. 3. Controls blood flow
  4. 6. The pressure in your arteries when your heart rests between beats
  5. 7. Tendinous fibers attached to the AV valves
  6. 8. Functions to clot blood
  7. 9. Thick walled chambers separated from the atria by AV valves
  8. 10. Smooth, thin, membrane lining
  9. 11. Divides the heart
  10. 14. Carry blood to the heart
  11. 19. The pressure in your arteries when your heart beats