They are present in the brain and spinal cord as glial cells that look like stars because of their many protrusions. There are more glial cells than neurons in the nervous system. It plays a role in helping th inner cells of the blood-brain barrie biochemically and supplies nutrients to nerve cells as there are protrusions attached to the blood vessel wall. In addition, it performs various roles such as regulating the concentration of ions in nerve cells, supporting nerve cells, removing wastes, and phagocytosis. In addition, when nerve tissue is damaged, it proliferates with a protrusion called a glioma to fill the area and to repair or destroy damaged tissue.

In Greek, it means a cell with branches. A type of glial cells, found only in the central nervous system, which consist of the brain and spinal cord. Its main function is to support and insulate the axons of neurons in the central nervous system of vertebrates and, finally, to the cell types that are generated. As part of the nervous system, oligodendrocytes are closely related to nerve cells and, like other astrocytes, play a role in supporting neurons.