White Matter

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Glial cells are also present in the white matter, but the white matter consists primarily of axon tracts.

In Lab 7, I will ask you to identify the axon. The small arrows are pointing out some of them. The gap around the axons is myelin. What is the advantage of axons and dendrites being myelinated? Which cells myelinate nerve processes in the central nervous system (CNS)? in the peripheral nervous system (PNS)? What is the difference between the way cells are myelinated in CNS and PNS? [Lab 7G]