myelin sheath

Noun myelin sheath has 1 sense

• myelin sheath(n = noun.body) medullary sheath - a layer of myelin encasing (and insulating) the axons of medullated nerve fibers;
is a kind of case, sheath
has parts: axolemma, nodes of ranvier, ranvier's nodes, oligodendria, oligodendroglia
is a part of medullated nerve fiber, myelinated nerve fiber