Cardiovascular System

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Across
  1. 3. Relaxation of the heartbeat
  2. 5. The muscular middle layer of the heart
  3. 6. Heartbeat
  4. 7. Membrane surrounding the heart
  5. 10. Pulmonary ______. Flow of blood from the heart to the lungs and back to the heart
  6. 12. Vessel
  7. 13. Largest artery in the body
Down
  1. 1. Record of the electricity flowing through the heart
  2. 2. _______ artery. Carries oxygen poor blood from the heart to the lungs
  3. 4. Carries blood away from the heart
  4. 8. Improper closing of the heart valves (extra sounds between normal beats)
  5. 9. Contraction phase of the heartbeat
  6. 11. _____ arteries. Carries oxygen rich blood to the heart