Glial cells play several crucial roles in the nervous system, supporting and maintaining neuronal function. These non-neuronal cells provide structural support, facilitate communication between neurons, and regulate the extracellular environment, ensuring optimal conditions for neuronal signaling. Additionally, glial cells are involved in protecting neurons from injury and infection, repairing nervous tissue, and aiding in the formation of the blood-brain barrier. Their importance extends beyond mere support, as they contribute significantly to overall brain function, highlighting the complex interplay between neurons and glial cells in maintaining nervous system health.