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Schwann cells are the supporting cells of the PNS. Like oligodendrocytes schwann cells wrap themselves around nerve axons, but the difference is that a single schwann cell makes up a single segment of an axon's myelin sheath.
Schwann cells are the principle glia, which are neuron supports, in the peripheral nervous system. Schwann cells make up what is called the myelin sheath around the axon of the neuron. The function of this sheath is to protect and direct the nerve impulses. Continue Reading.