Here is an animated explanation of non-neuronal cells -the Neuroglia.It discusses three major types of glial cells in the brain: oligodendrocytes, microglia, and astrocytes. Timeline: 00:03 overview 00:23 The major types of glial cells 00:31Oligodendrocytes 00:53 Microglia 01:10 Astrocytes and Blood Brain Barrier