The Cardiovascular System

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Across
  1. 2. the two upper chambers of the heart; singular version of this is atrium
  2. 5. the ability to pump blood effectively throughout the body
  3. 7. pertaining to the heart and blood vessels
  4. 8. rhythmic pressure against the walls of an artery
  5. 9. occurs when the ventricles relax
  6. 12. large blood vessels that carry blood to all regions of the body
  7. 14. plasma fluid after the blood cells and the clotting proteins have been removed
  8. 15. blood cells involved in defending the body against infective organisms and foreign substances
  9. 16. mature red blood cells produced by red bone marrow
  10. 17. a double-walled membranous sac that encloses the heart
  11. 19. the oxygen-carrying blood protein pigment of erythrocytes
  12. 21. the middle and thickest layer of the heart; also the cardiac muscle
  13. 23. located between the left atrium and left ventricle
Down
  1. 1. the smallest blood vessels in the body
  2. 3. the two lower chambers of the heart
  3. 4. a hollow, muscular organ located in the thoracic cavity
  4. 6. the measurement of the amount of systolic and diastolic pressure exerted against the walls of the arteries
  5. 10. occurs when the ventricles contract
  6. 11. the inner lining of the heart
  7. 13. controls the opening between the right atrium and right ventricle
  8. 18. the largest blood vessel in the body
  9. 20. the external layer of the heart
  10. 22. straw-colored fluid that contains nutrients, hormones, and waste products