medullary sheath

1. A layer of myelin encasing (and insulating) the axons of medullated nerve fibers (synset 105472337)
   is a type of: case, sheath - an enveloping structure or covering enclosing an animal or plant organ or part
   has:

   • axolemma - outer membrane covering an axon
   • nodes of ranvier, ranvier's nodes - small gaps in the myelin sheath of medullated axons
   • oligodendria, oligodendroglia - tissue consisting of glial cells with sheetlike processes that form the myelin sheath of nerve fibers
   is a part of: medullated nerve fiber, myelinated nerve fiber - a nerve fiber encased in a sheath of myelin
   substance holonym: medulla, myelin, myeline - a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers
   same as: myelin sheath

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