HUman Heart and Circulation

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Across
  1. 2. Blood vessels carrying blood towards the heart.
  2. 3. The heart's two upper chambers.
  3. 5. Muscular wall separating the two halves of the heart.
  4. 6. Structures that control blood flow within the heart.
  5. 9. Valve separating the right atrium and right ventricle.
  6. 11. Blood vessels carrying blood away from the heart.
  7. 12. Node that signals the ventricles to contract.
Down
  1. 1. The heart's "pacemaker".
  2. 4. The main artery carrying blood from the heart.
  3. 7. Major veins carrying blood from the body to the heart.
  4. 8. Another name for the mitral valve, separating the left atrium and left ventricle.
  5. 10. The heart's two lower chambers.