Microglia-CNS: Macrophages that work in the immune system.
They protect neurons. They proliferate in the event of brain
 They clear waste products from the nervous system through a
process called phagocytosis.
 Radial Glial Cells-CNS: Temporary cell populations involved in
the formation of the CNS.
 Gliosis is a response of the CNS to brain or spinal cord injury.
Any CNS injury can cause gliosis.
 Gliosis is a prominent feature of many diseases of the central
nervous system, including multiple sclerosis (MS) and stroke