Talk about schwann cells

These are the glial cells of the PNS. Their plasma membrane is coated by a continuous basal lamina. Their cytoplasm contains the usual organelles of the cell. Schwann cells divide as the axon lengthens. In this way, all axons of the PNS are surrounded by Schwann cells. Schwann cells produce myelin in the PNS; they also have a nutritive role for the axon. They have a macrophagic role and are essential for the regeneration of axons.