Neurons and glial cells, colored SEM. The nerve cells have small cell bodies (orange) and fine extensions called axons and dendrites (brown). The glial cells have large cell bodies (blue) with thicker extensions (pale green).
BE_Myelinated nerves. A section through myelinated nerve fibers and Schwann cells. Myelin (green) is an insulating fatty layer that surrounds the nerve fibre (axon, black), increasing the speed at which nerve impulses travel.
Neurons are the brain’s rock stars. But without the glial cells — astrocytes, microglia and oligodendrocytes — there would be no show at all. A diagram by Arne Hurty for Stanford Medicine Magazine Fall