The Cardiovascular System

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Across
  1. 2. the thin-walled blood vessels with semi-permeable membranes to allow for gas exchange
  2. 7. Cavity the space between the pericardium and the epicardium
  3. 10. divides the heart into left and right parts
  4. 11. Circulation when blood is pumped from the heart to the lungs and then back to the heart
  5. 13. System circulates oxygen-rich blood throughout the body
  6. 15. Valves located between the atrial and ventricular chambers in the right and left sides of the heart
  7. 16. the contraction of the ventricles
  8. 18. the heart is enclosed by this fibroserous sac
  9. 20. using a stethoscope to listen to the heart
Down
  1. 1. the relaxation of the ventricles
  2. 3. the innermost layer that lines the four chambers and covers the valves of the heart
  3. 4. the thin and watery layer that forms the innermost layer of the pericardium
  4. 5. layer of cardiac muscle that makes up the middle of the heart
  5. 6. an instrument used to measure blood pressure
  6. 8. the lowest part of the exterior of the heart
  7. 9. tiny blood vessels that merge with the veins
  8. 12. the functional inter-relationship between the heart and the lungs
  9. 14. carry oxygenated blood from the heart to the organs and cells of the body
  10. 17. carry oxygen-poor blood to the heart
  11. 19. the largest artery of the human body