In the brain there are 2 types of cells Neurons and Glial Cells. There are 10 times more Glial in the brain than neurons. Glial cells are found in both the CNS and the PNS. Glial cells are a general name given to a variety of cells. Some types of Glial cells in the CNS contain Oligodendrocytes, Astrocytes , Ependymal cells and Microglia. Oligodendrocytes are responsible for forming Myelin sheaths and wrapping it around axons. Astrocytes have many functions. Astrocytes from support for the CNS. Astrocytes also help from the Blood-Brain barrier. Another function of is to secrete Nerurotropic factors. Astrocytes also take up K+ neurotransmitters. Ependymal cells create barriers between cells. Microglia act as the immune system of the brain it protects the brain from bacteria and other harmful things that try to enter the brain. Another function of microglia is to act like scavengers . The PNS contains its own kinds of Glial Cells. One type is known as Schwann cells. Schwann cells feature similar functions as Oligodendrocytes in the CNS. Both Schwann cells and Oligodendrocytes help from Myelin sheaths. However Schwann cells also secrete Neurotropic factors. The last type of Glial cells in the PNS are satellite cells. Satellite cells support cell bodies.
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August 2019
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