Neuroglia

Functions

-Smaller and numerous then neurons

-Don't generate or conduct action potentials

-Provide support to neurons

-Can multiply and divide

Neuroglia (CNS)

-Astrocytes

-Oligodendrocytes

-Microglia

-Ependymal

Neuroglia (PNS)

-Schwann Cells

-Satellite Cells

Astrocytes

-star shaped glial cell

-end feet come in contact with blood capillaries, neurons, pia mater

Pia Mater

surrounds the brain and spinal cord

Functions of astrocytes

-Create the BBB which regulates which substances can enter the brain

-Secretes chemicals which regulate the growth of neurons in the embryo

-Maintain the chemical environment of the CNS

-Play a role in learning and memory

Oligodendrocytes

-Form and maintain the myelin sheath around the CNS neurons

-produces myelin for CNS

Microglia

-small with spikelike projections

-Functions as phagocytes which remove cellular "trash" and remove damaged nerve tissue

Ependymal Cells

-circulates cerebrospinal fluid

-cubodial cells, line up in single layers

-have microvilli and cilia

-line ventricles of brain

Cerebrospinal Fluid

circulates through the ventricles of the brain and spinal cord

Schwann Cells

-produces myelin for PNS

-each cell myelinates a single axon

-surrounds PNS axons

-takes part in axon regeneration

Satellite Cells

- surrounded neuron cell bodies in the PNS

-Regulate exchange of materials between cell bodies and interstitial fluid