The heart

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  • Created by: Bethhy
  • Created on: 16-04-14 13:07
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  • The heart
    • Right
      • blood enters the heart through the inferior vena cava and superior vena cava
        • semilunar valves stop back flow from the atrium
          • Atrium fills with blood- pressure builds
            • Tricuspid valve (atrioventricular valve) opens allowing ventricle to fill too
              • (tendinous cords stop the valve turning inside out when under so much pressure)
                • The muscular ventricle walls contact pushing blood into the PULMONARY ARTERIES.
                  • Takes deoxygenated blood from the heart to the capillary beds in the lungs
    • Left
      • PULMONARY VEINS bring oxygenated blood from lungs to the heart
        • left atrium fills up
          • Bicuspid valve prevents back flow from the atrium to the ventricle
            • Ventricle fills up under high pressure
              • Ventricle contracts forcing blood into the AORTA.
                • Left side of the heart is thicker than the right because it has to force blood all around the body compared to the right side which just has to go to the lungs
                  • Takes deoxygenated blood from the heart to the capillary beds in the lungs

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