Ranvier's nodes


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Noun1.Ranvier's nodes - small gaps in the myelin sheath of medullated axons
medullary sheath, myelin sheath - a layer of myelin encasing (and insulating) the axons of medullated nerve fibers
opening, gap - an open or empty space in or between things; "there was a small opening between the trees"; "the explosion made a gap in the wall"
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