cardiovascular system

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Across
  1. 2. The number of times the heart contracts per minute
  2. 5. the contraction period of the heartbeat cycle
  3. 7. cavity under the left atrium
  4. 8. The largest artery.
  5. 9. A vessel that carries blood away from the heart
  6. 10. The vessel that carries blood from the right side of the heart to the lungs
  7. 12. The large inferior vein that brings blood low in oxygen back to the heart
  8. 14. The vessels that carry blood from the lungs
  9. 15. The valve between the left atrium and the left ventricle
  10. 16. The relaxation phase of the heartbeat cycle
Down
  1. 1. The valve between the right atrium and right ventricle
  2. 3. cavity under the right atrium
  3. 4. The valve at the entrance to the pulmonary artery
  4. 6. force of blood against the wall of a vessel
  5. 11. The muscular organ that contracts rhythmically to propel blood throughout the body
  6. 13. name of the two upper chambers of the heart