| NOUN | body | myelin sheath, medullary sheath | a layer of myelin encasing (and insulating) the axons of medullated nerve fibers |
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| Meaning | A layer of myelin encasing (and insulating) the axons of medullated nerve fibers. | |
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| Synonym | medullary sheath | |
| Part of | medullated nerve fiber, myelinated nerve fiber | A nerve fiber encased in a sheath of myelin |
| Parts | Ranvier's nodes, nodes of Ranvier | small gaps in the myelin sheath of medullated axons |
| axolemma | Outer membrane covering an axon | |
| oligodendroglia, oligodendria | tissue consisting of glial cells with sheetlike processes that form the myelin sheath of nerve fibers | |
| Broader | sheath, case | An enveloping structure or covering enclosing an animal or plant ... / plant organ or part |
| Substances | myelin, myeline, medulla | A white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers |
| Spanish | capa de mielina, capa medular | |
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