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(neuroanatomy) An envelope of myelin that surrounds nerve fibres.

Neuron, with myelin sheath labeled as e

(neuroanatomy) An envelope of myelin that surrounds nerve fibres.

Structure of simplified neuron in the peripheral nervous system with myelinating Schwann cells

(neuroanatomy) An envelope of myelin that surrounds nerve fibres.

Neuron with myelinating oligodendrocyte and myelin sheath in the central nervous system