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The astrocytes provide structural support, join parts, and assist in the regulation of concentrations of nutrients and ions. Oligodendrocytes provide insulation (myelin) around axons. Microglia support neurons phagocytize bacterial cells and debris. They also form scars in dammaged areas. Ependymal cells cover specialized brain parts and make up the inner linings that surround spaces in the brain and spinal cord.

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What are found in the CNS and act as the glue that binds axons and blood vessels to each other?

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These neuroglia are called astrocytes. They play a vital role in maintaining the proper chemical balance in the extracellular space around neurons by regulating potassium levels and recycling neurotransmitters.


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Astrocytes play a crucial role in the defense of the central nervous system (CNS) by providing structural support, maintaining the blood-brain barrier, promoting neuronal repair, and modulating immune responses. They also help regulate the extracellular environment by clearing neurotransmitters and metabolic waste products. Overall, astrocytes contribute to the defense and maintenance of the CNS through their diverse functions.


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