#oligodendroglia  tissue consisting of glial cells with sheet-like processes that form the myelin sheath of nerve fibers
  supertype:  neuroglia  sustentacular tissue that surrounds and supports neurons in the central nervous system; glial and neural cells together compose the tissue of the central nervous system
  part:  oligodendrocyte
  part of:  medullary_sheath__medullarysheath__myelin_sheath  a layer of myelin encasing (and insulating) the axons of medullated nerve fibers
     part of:  medullated_nerve_fiber__myelinated_nerve_fiber  a nerve fiber encased in a sheath of myelin

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