Glia

About

Glia, also called glial cells or neuroglia, are non-neuronal cells in the central nervous system and in the peripheral nervous system that do not produce electrical impulses. The neuroglia make up more than one half the volume of neural tissue in the human body. They contribute to the maintenance of homeostasis, help form myelin, and provide support and protection for neurons. In the central nervous system, glial cells include oligodendrocytes, astrocytes, ependymal cells and microglia, and in the peripheral nervous system they include Schwann cells, and satellite cells.

Summary from Wikipedia