(AQA GCSE B3.2.1) The Blood

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  • Created by: Em
  • Created on: 18-04-13 18:30
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  • The Blood
    • What's in the blood?
      • Plasma
        • Pale yellow fluid, everything is suspended in this
          • Transports carbon dioxide from organs to lungs
            • Also transports soluble products -amino acids, sugars, etc.
      • Red blood cells
        • Special shape to maximise surface area, transport oxygen to cells in the body
          • They have no nucleus, produced in bone marrow and not by mitosis
            • Red blood cells carry HAEMOGLOBIN which react with oxygen to form OXYHAEMOG-LOBIN
              • Oxyhaemoglobin transports oxygen to cells, goes through reverse reaction and splits into oxygen and haemoglobin again
                • Haemoglobin stays in red blood cell, oxygen diffuses into cells for respiration
      • White blood cells
        • Immune system, defends body against microorganisms (more detail is unnecessary for this spec)
      • Platelets
        • Fragments of cells
          • Help the blood to clot when there is a cut
            • No nucleus
      • Urea
        • Produced in liver from extra amino acids, broken down
          • Transported in blood to kidneys, filtered to bladder into urine


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