GENERAL HISTOLOGY

Detailed explanation-1: -Neurolemmocytes form a myelin sheath around axons in the peripheral nervous system, and oligodendrocytes form a myelin sheath around axons in the central nervous system. Astrocytes form a myelin sheath around axons in both the peripheral nervous system and the central nervous system.

Detailed explanation-2: -Myelin is an insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord. It is made up of protein and fatty substances. This myelin sheath allows electrical impulses to transmit quickly and efficiently along the nerve cells.

Detailed explanation-3: -Schwann cells (also known as neurolemmocytes) are flat cells which make up myelin sheaths on axons of the peripheral nervous system.

Detailed explanation-4: -Myelin sheath in central nervous system (CNS) is formed from oligodendrocytes (analogous to Schwann cells in the peripheral nervous system).