Final answer:
Astrocytes, oligodendrocytes, microglia, and ependymal cells are essential glial cells in the CNS with distinct functions.
Explanation:
Astrocytes, oligodendrocytes, microglia, and ependymal cells are types of glial cells found in the CNS, each with specific roles. Astrocytes provide nutrients, regulate chemical concentrations, and form the blood-brain barrier to block toxins. Oligodendrocytes produce myelin, microglia act as immune defenders, and ependymal cells produce cerebrospinal fluid.
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