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Glial Cells

  1. CNS

    • Grey matter = CNS Cell bodies
    • White matter = Axon covered by Neural glial cells

  2. PNS (Satellite cells,Schwann cells)

    • Ganglia = Peripharal Neural Cell body covered by Satellite Cells
    • Nerves = Multiple neurons by Schwann cells

graph TD
    X{Nervous System Supporting Cells} ==>1[CNS Glial cells];
    1 ==> 1a[4 types of Supporting cells]
    1a ==>|covers the Axon| 1a1[Oligodendrites];
    1a ==>|immunity| 1a2[Microglia];
    1a ==>|nutrient Monitering by  Blood Brain Barrier 
    and connectionto others cells | 1a3[Astrocytes<mark> star shaped</mark>];
    1a ==>|covering CSF canals like Ventricules| 1a4[Ependymal Cells];
    1a4 ==> 1a4a[cilia,microvilli present,
    <mark> on special regions produce CSF = choroid Plexus </mark>];
    1a3 ==>|secrete glial fibrillation Acidic Protein| 1a3a[Diagnose Astrocytoma];
    X ==>2[PNS Glial cells]
    2 ==>|covers PNS cell body segment| 2a[Satellite cells]
    2 ==>|cover Axon segment| 2b[Schwann cells];

PNS

Myleinated Axon

Myleinated Axon with Schwann cells with Node of Ranvir

Node of Ranvir

- Space between Schwann cells for Voltage Gated Channels for Depolarisation and Repolarization

Un-Myleinated Axon

Schwann cells surrounding a Un-myleinated Axons

CNS

Mylienated Axon

  • One oligodentrites cover multiple axons Oligodentrite covering multiple nearby axons

De-myelination diseases

Guillian-Barre Syndrome Multiple Sclerosis
Damaged done Immune system Immune System
Molecular Mimicry Campylo-bactor
Location Peripheral Mylein sheath CNS mylein sheath