CARDIAC SYSTEM

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Across
  1. 3. An upper chamber of the heart.
  2. 5. The lower chamber of the heart that pumps blood out.
  3. 7. Blood vessel that carries blood away from the heart
  4. 8. The valve between the left atrium and left ventricle
Down
  1. 1. The cardiac cycle when the heart contracts
  2. 2. The side of the heart that pumps blood to the lungs
  3. 4. The cardiac cycle when the heart relaxes and fills with blood.
  4. 6. Blood vessel that carries blood toward the heart
  5. 7. The main artery that carries blood from the heart to the body