Oligodendrocytes produce myelin within the central nervous system (CNS). The cells that do this in the peripheral nervous system are.
the neuronal axons themselves,
O specialized fibroblasts of the surrounding connective tissue.
o oligodentrocytes that follow the nerve cell axon out of the CNS and do the same job in the peripheral nervous system.
Schwann cells

Explanation:

The nervous system is made up of neurons, specialized cells that can receive and ... Glia can be compared to the workers at the electric company who make sure wires go ... Along the axon there are periodic gaps in the myelin sheath. ... Multipolar neurons can be found in the central nervous system (brain and spinal cord).

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