Question

Whats in the PNS they are the glue that holds the nerve fiber together and form the myelin sheath around them.

Answer 1

In the peripheral nervous system (PNS), the cells that act as "glue" and are responsible for forming the myelin sheath around nerve fibers are called **Schwann cells**. These specialized glial cells wrap around axons to provide insulation, which is crucial for the rapid transmission of electrical signals along the nerve fibers. Additionally, Schwann cells are involved in the repair and regeneration of peripheral nerves following injury.