Much like the insulation around the wires in electrical systems, glial cells form a membraneous sheath surrounding axons called myelin, thereby insulating the axon. This myelination, as it is ...

A long fibre (axon) which is insulated by a fatty (myelin) sheath. They are long so they can carry messages up and down the body. Tiny branches (dendrons) which branch further as dendrites at each ...

(B) Illustration of transverse section of myelinated axon at the internode. (C) Light microscopy of a mouse sciatic nerve at lower magnification. Toluidine blue staining. Myelin is stained in blue.

"We proposed that, during evolution, the emergence of myelin coincided with the loss of lipid droplets in axon-associated glial ... fatty acids from the myelin sheath," added Nave.