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Per Brodal

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date: 06 March 2021

Chapter 2 deals with glial cells, which make up the other main cellular component of nervous tissue. Glial cells are necessary for the proper functioning of the neurons. They are important for homeostasis by controlling extracellular ion concentrations and water balance. During prenatal development glial cells guide the growth and migration of the neurons. There are three main kinds: astrocytes that are mainly concerned with homeostatic tasks, oligodendroglial cells that produce myelin sheaths (insulating axons), and microglial cells that are activated by injury and help with reparative processes.

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