Circulatory System

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Across
  1. 2. emptying deoxygenated blood into the heart chambers
  2. 4. pumps blood through the pulmonary circulatory system
  3. 6. series of pressure changes in the ventricle
  4. 9. muscular organ that pumps blood throughout the body
  5. 13. smallest type of blood vessel
  6. 15. thick middle layer of the heart wall
  7. 17. prevents backflow of blood
  8. 18. receives deoxygenated blood from the body
  9. 19. covers outer surface of the heart
  10. 20. fibrous sac surrounding the heart
  11. 21. liquid portion of blood
Down
  1. 1. makes up portion of the heart wall
  2. 3. Covering inner surface of the heart wall
  3. 5. supply blood to heart muscle
  4. 7. receives oxygenated blood from the lungs
  5. 8. allow blood to flow from the atria to the ventricles
  6. 10. delivers deoxygenated blood and CO2 to the lungs
  7. 11. main artery carring blood away from the heart to the body
  8. 12. name
  9. 14. erythrocyte
  10. 16. pumps blood through the systemic circulatory system.