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Download NEUROGLIA (Glial cells) Supporting cells of the CNS and PNS
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Transcript
NEUROGLIA (Glial cells) Astrocytes Supporting cells of the CNS and PNS Microglia Oligodendrocytes Ependymal Cells Schwann Cells Satellite Cells Division CNSCNSCNSCNSPNSPNS Location Grey Matter Grey Matter White Matter/TractsCavities Axons Ganglion Histology Astrocytes •Anchors neurons to capillaries in the grey matter of the CNS •Reclaims K+ for use in the sodium potassium pump •Metabolizes glucose for metabolic function and ATP production •Reclaims Ach Microglia •Resident CNS Macrophage that migrates toward injured neurons •Phagocytize necrotic tissue, microorganisms and foreign substances Oligodendrocytes •Neural insulating cell in the white matter of the CNS •One cell can extend its phospholipid bilayer to cover 15-60 tracts •Forms the myelin sheath Ependymal Cells •Ciliated cuboidal cells, lining the spinal cord and brain •Circulates the cerebrospinal fluid at their apical surface Schwann Cells •Wraps around the axons in the PNS forming the myelin sheath •Insulates motor neurons for conduction speed and distance •Spaces in between cells form the Nodes or Ranvier Satellite Cells •Surrounds the cell bodies (ganglion) of the PNS •Maintains the integrity of the chemical environment •Equivalent in function to Astrocytes of the CNS
