Reproduction 
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    What are these 'follicles'? They are the oocytes and the cells surrounding them in the ovary. Drag the labels into position as you review follicle development. 
 
 
 
 
 
 
 
 
 
 
 
 
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          Oocytes are the resting, immature egg cells
         
      
 which develops a clear protective layer, the zona
      pellucida 
surrounded by granulosa cells 
    a new layer of protective cells, the thecal cells, are
      stimulated by LH to produce
      androgens and
      help attract blood
      vessels to support the developing follicle.
     
the granulosa cells convert the
          androgens to estrogen. They also develop
        many FSH
        receptors. 
      when stimulated by FSH, the follicle enlarges around
          the
            oocyte 
      
 
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