Neuroglia -

: Surround neuron cell bodies in ganglia to provide physical support and regulate their chemical environment.

: The brain’s resident immune cells. They act as macrophages, scavenging for dead cells, debris, and pathogens. neuroglia

: These line the brain's ventricles and help produce and circulate cerebrospinal fluid (CSF) using hair-like cilia. Peripheral Nervous System (PNS) : Surround neuron cell bodies in ganglia to

: These cells produce myelin , a fatty sheath that wraps around axons to speed up electrical signals. scavenging for dead cells