Neuroglial Cells 1.3

Nerve

found only in PNS/ groups of axons wrapped in connective tissues

Ganglia

found in PNS/ cell bodies of neurons grouped together in masses

Neuroglial Cells

support cells for neurons

Schwann Cells

Composed of fatty myelin sheath

protects nerve axon

increase speed of nerve impulses

Nodes of Ranvier

Gaps between the Schwann cells

Saltatory Conduction

jumping between nodes

Ependymal Cells

Found in CNS

Circulate cerebrospinal fluid (CSF)

Protect brain and spinal cord/ allow fluid exchange

Oligodendrocytes

Insulation for CNS axons

Astrocytes

Control chemical environment of neurons

Wrap around the blood capillaries

Blood brain barrier (Physical barrier/ allows passage of only certain substances into the CNS)

Microglial

Protects the CNS

Phagocytosis (Eat up dead cells and pathogens

Neuroglial cells of PNS

Neuroglial cells of CNS