Which cells wrap axons in myelin in the brain and spinal cord, and which do it in the nerves of the body? · Lobeworks/17

Oligodendrocytes in the brain and spinal cord, Schwann cells in the peripheral nerves.

Which cells wrap axons in myelin in the brain and spinal cord, and which do it in the nerves of the body?

Oligodendrocytes in the brain and spinal cord, Schwann cells in the peripheral nerves. An oligodendrocyte sends out many arms and wraps segments of up to dozens of different axons, while a Schwann cell wraps a single segment of a single axon; in both, the sheath is the cell's own membrane wound tens to over a hundred times.