Heart

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Across
  1. 3. valve located between the right ventricle and pulmonary artery
  2. 4. valve located between the right atrium and right ventricle
  3. 5. valve located between the left ventricle and the aorta
  4. 7. double-layered membrane that covers the outside of the heart
  5. 8. ventricular contraction in the cardiac cycle
  6. 12. wall that separates the heart into a right and left side
  7. 13. muscular middle layer of the heart
  8. 14. this atrium receives blood from the lungs
  9. 15. this ventricle pumps blood into the the pulmonary artery
Down
  1. 1. "pacemaker" of the heart
  2. 2. smooth layer of cells that lines the inside of the heart
  3. 6. resting period in the cardiac cycle
  4. 9. abnormal heart rhythms
  5. 10. device that shocks the heart
  6. 11. this atrium receives blood as it returns from the body
  7. 13. valve located between the left atrium and left ventricle
  8. 14. this ventricle pumps blood into the aorta