Non-neuronal cells, also known as glial cells, play a critical role in supporting and repairing the nervous tissue. Glial cells, which outnumber neurons in the nervous system, are essential in maintaining the structure and function of neurons and the overall health of the nervous system.

One important function of glial cells is to provide structural support to neurons. Astrocytes, for example, are star-shaped cells that help to maintain the structural integrity of neurons and regulate the extracellular environment of the brain. They form a physical and biochemical barrier between neurons and the surrounding tissue, and also provide nutrients and oxygen to neurons.

In addition to their structural support role, glial cells are involved in repairing and regenerating the nervous tissue after injury or damage. For example, oligodendrocytes and Schwann cells, which produce myelin, can help to repair damaged axons and improve neuronal signaling. Microglia, the immune cells of the nervous system, can remove damaged cells and debris and promote tissue repair.

Overall, glial cells are essential for the proper function and maintenance of the nervous system. Their ability to provide structural support and repair damaged tissue makes them a critical target for research aimed at understanding and treating neurological disorders and injuries.