What role do glial cells play in the nervous system?

Glial cells play a crucial role in the nervous system by providing support, nourishment, and protection to neurons. They are essential for maintaining homeostasis, forming myelin, and assisting with the overall functioning of nervous tissue. Glial cells do not primarily transmit signals like neurons do; their main functions revolve around supporting neuron health and facilitating communication among them. They are involved in the maintenance of the neuronal environment, responding to injury, and maintaining the blood-brain barrier, which protects the brain from harmful substances. This multifaceted support system is vital for the overall efficiency and functionality of the nervous system.