The heart

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  • Created by: siobhan
  • Created on: 05-05-13 16:51
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  • The Heart
    • the heart is a muscular organ that pumps blood around the body. it's actually two pumps held together
    • the right pump forced deoxygenated blood to the lungs where it picks up oxygen and loses carbon dioxide
      • After returning to the heart, the oxygenated blood is then pumped to the rest of the body by the left pump
    • The heart has four chambers. The upper ones called atria receive blood from the vena cava on the right and the pulmonary vein on the left.
      • The atria contract to move blood to the lower chambers called the ventricles
        • When the ventricles contract they force blood out into the pulmonary artery on the right side and into the aorta on the left side
      • When the ventricles contract they force blood out into the pulmonary artery on the right side and into the aorta on the left side
    • Valves in the heart prevent blood from flowing in the wrong direction.
    • The heart muscle is supplied with oxygenated blood by the coronary arteries
    • The action of the two sides of the heart results in a double circulation

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