Medullary Sheath (noun) Definition, Meaning & Examples

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noun
  1. a narrow zone made up of the innermost layer of woody tissue immediately surrounding the pith in plants.
  2. myelin sheath.
noun
  1. a myelin layer surrounding and insulating certain nerve fibres
  2. a layer of thick-walled cells surrounding the pith of the stems of some higher plants
Medullary Sheath (noun) Definition, Meaning & Examples

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