Circulation

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  • Created by: dmistry02
  • Created on: 14-06-14 16:56
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  • Circulation
    • heart
      • mainly made of muscle
      • left ventrical has a thicker wall - blood pumped further
      • cardiac cycle
        • oxygenated
          • Aorta - major artery
          • pulmonary veins - from lung
          • Left Atrium - top left of heart
          • left ventrical -  bottom left of heart.
        • De-oxygenated
          • Pulmonary Artery - blood to lung
          • Vena-Cava - blood from body
          • Right Atrium
          • Right Ventrical
      • coronary artery
        • supplies blood (oxygen and glucose) to the heart muscle
        • A branch of the aorta
        • a block can cause heartattack
    • The circulatory system
      • humans have a double circulatory system (8)
      • Blood though the heart twice in one cycle
      • Blood in each circuit is kept separate
      • delivers oxygen and glucose to cellls
      • Arteries - blood vessels that carry blood away from the heart
      • Veins - carry blood towards the heart
      • capillaries - very thin blood vessels which have walls that are only a cell thick
      • How does the circulatory system work.
        • 1. The left side of the heart pumps oxygenated blood to the body, via the aorta
          • 2. De-oxygenated blood returns to the heart via the Vena Cava (right)
            • 3. The Pulmonary vein pumps blood to the lungs
              • Oxygenated blood returns to the heart through the pulmonary vein
                • 1. The left side of the heart pumps oxygenated blood to the body, via the aorta
                  • 2. De-oxygenated blood returns to the heart via the Vena Cava (right)
                    • 3. The Pulmonary vein pumps blood to the lungs
                      • Oxygenated blood returns to the heart through the pulmonary vein
      • Blood
        • transports useful chemicals around the body
          • oxygen and glucose needed for cells aerobic respiration
          • Carbon dioxide is waste
        • Plasma
          • liquid part of blood
          • transports nutrients, amino acids, anti-bodies and hormones to tissues
        • Red blood cells
          • Transports O2
          • bound to heamoaglobin
          • no nucleas
          • oxygen binds with heamoglobin
            • oxy-haemaglobin.
        • White blood cells
          • bodies imune system
          • fights infections
        • platelets
          • sticks together when blood cells are damaged
          • help form a clot
      • Diffusion in the circulatory system
        • Red blood cells
          • bio concave - larger surface area for oxygen exchange
        • process
          • 1. high pressure forces plasma through capillary wall - becomes tissue fluid
          • 2. high pressure forces oxygen from blood cells into the tissue fluid
          • 3. Low blood pressure at the end of cappillary allows waste products (CO2 and urea) into blood stream
    • process
      • 1. high pressure forces plasma through capillary wall - becomes tissue fluid
      • 2. high pressure forces oxygen from blood cells into the tissue fluid
      • 3. Low blood pressure at the end of cappillary allows waste products (CO2 and urea) into blood stream

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