Neuroglia

: These line the brain's ventricles and help produce and circulate cerebrospinal fluid (CSF) using hair-like cilia. Peripheral Nervous System (PNS)

Neuroglia are categorized by their location in either the Central Nervous System (CNS) or the Peripheral Nervous System (PNS). Central Nervous System (CNS) neuroglia

: The most abundant glial cells. They maintain the blood-brain barrier, regulate the chemical environment (like potassium ions), and provide nutrients like lactate to neurons. : These line the brain's ventricles and help

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

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