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Astrocytes
CNS: maintain blood-brain barrier; structural support; talk to neurons (via glutamate)
Oliogodendrocytes
CNS: myelinates and insulates axons; allows faster AP
Microglia
CNS: phagocytes (cleans by engulfing); monitor for damage or infection; immune defense
Ependymal
CNS: line ventricles and central canal; produce CSF, cilia help it flow
Schwann
PNS: creates myelin sheath around axon, only one segment; rapid AP; growth and repair
Satellite
PNS: insulates; regulates nutrient and waste exchange for cell bodies in ganglia