Circulatory System

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Across
  1. 3. the largest artery in the body
  2. 4. caused by the alternating expansion and relaxation of the artery wall
  3. 5. pumps blood out of the heart
  4. 8. a force exerted by blood against the walls of the blood vessels
  5. 9. receives blood that comes into the heart
  6. 11. blood vessels that carry blood away from the heart
  7. 12. also called the circulatory system, consists of the heart, blood vessels, and blood
  8. 13. the process by which molecules move from an area of higher concentration to an area of lower concentration
  9. 14. blood vessels that carry blood back to the heart
Down
  1. 1. tiny, narrow vessels
  2. 2. a flap of tissue that prevents blood from flowing backward
  3. 4. force per unit area
  4. 6. first branches, called the
  5. 7. sends out signals that make the heart muscle contract
  6. 10. a hollow, muscular organ that pumps blood throughout the body