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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.
Confidence votes 86. Schwann cells are part of the peripheral nervous system (PNS.) They have two major functions, they produce the myelin sheath which covers the schwan cell, which helps to repair and regenerate nerves that have been damaged.