What is the function of the glial cells in the nervous system?

The function of glial cells in the nervous system is primarily to support and protect neurons. While neurons are responsible for transmitting signals throughout the nervous system, glial cells play several crucial roles that ensure the optimal functioning of these neurons. They provide structural support, maintain the extracellular environment, supply nutrients, and assist in the repair of nervous tissue after injury.

Additionally, glial cells are involved in insulating neuronal axons to facilitate faster signal transmission and help form the blood-brain barrier, which protects the brain from harmful substances in the bloodstream. Their supportive and protective functions are vital for overall brain health and activity, making them indispensable components of the nervous system.