Cardiac System

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Across
  1. 2. Lower chamber of the heart that pumps blood out
  2. 3. microscopic blood vessel where oxygen and nutrients are exchanged with tissues
  3. 6. the rhythmic throbbing of arteries produced by the beating heart
  4. 8. Upper chamber of the heart that receives blood
  5. 11. medical term for an abnormally fast heart rate
  6. 12. the thick, muscular middle layer of the heart wall
  7. 13. the protective, fluid-filled sac surrounding the heart
  8. 14. the network of blood vessels that supply the heart muscle itself
Down
  1. 1. medical instrument used to listen to heart sounds
  2. 2. a flap of tissue that prevents the backward flow of blood
  3. 4. relating to the lungs, as in the arteries and veins connecting them to the heart
  4. 5. the largest artery in the body, carrying oxygen-rich blood away from the heart
  5. 7. the muscular wall dividing the left and right sides of the heart
  6. 9. medical term for an abnormally slow heart rate
  7. 10. the heart's natural electrical node that regulates rhythm