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==Introduction==
* The CNS is composed of two major cell types:
*# Neurons
*# Glial cells, which include:
*#* Astrocytes
*#* Oligodendrocytes
*#* Microglial cells
*#* Ependymal cells
*#* Choroid plexus epithelial cells
* The response to injury varies with the cell type injured.
[[Category:Central Nervous System - Pathology]]