Circulatory System

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Across
  1. 2. lower chamber of the heart that pumps blood out
  2. 4. hollow muscle that pumps blood throughout the body
  3. 7. flap of tissue in the heart that prevents blood from flowing backward
  4. 8. blood vessel that carries blood to the heart
  5. 10. largest artery in the body
Down
  1. 1. blood vessel that carries blood away from the heart
  2. 3. system that consists of the heart and blood vessels; another name for the circulatory system
  3. 5. the alternating expansion and relaxation of the artery wall as blood travels through it
  4. 6. tiny blood vessel where substances are exchanged
  5. 9. upper chamber of the heart that receives blood