Stem cells

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  • Stem Cells
    • Sources of stem cells
      • Adult
        • Bone Marrow
        • Blood
      • Embryonic
        • Placenta
        • Umbilical cord
        • Blastocyst
    • Types
      • Pluripotent
        • A non specialized cell that has the ability to differentiate into most of the cells in the body
      • Totipotent
        • A  non specialized cell that has the ability to differentiate into any of the cells in the body
      • Multipotent
        • A non specialized  that has the ability to differentiate into some cells in the body that are related to the source of the multipotent cell
    • Ethics
      • Using embryonic stem cells - some people class it as life
      • A regulatory authority is the UK Human         Fertilization and Embryology Authority (HFEA)
    • Core Practical
      • Plant Tissue Culture - showing the totipotency of plant cells
        • Germinate some seeds
          • Prepare agar and pour a layer into sterilised pots
            • Carefully cut just below the leaves
              • Push gently into agar jelly
                • Put cling film lid over pot
      • What to look for
        • Growth of roots and/or the rest of the plant
    • Problems with using stem cells
      • High chance of rejection, even with donors that are relatives
      • Ethical issues and restrictions from governing bodies in concern with the use of embryonic stem cells

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