NEUROGLIA

GLIA CELLSIN THE PNS

GLIA CELLSIN THE CNS

- Schwann cell

- Satellite cell

- Oligodendrocytes

- Microglia

- Astrocyte

- Ependyma

Myelin formation in nerve fibers:

Schwann-cell(PNS)

Oligodendrocyte(CNS)

PERIPHERAL NERVE IN TRANSVERSE SECTION

PERIPHERAL NERVE IN TRANSVERSE SECTION

ParaneuriumEpineurium

Perineurium

EndoneuriumAdipose tissue

Artery, Vein

PERIPHERAL NERVE IN TRANSVERSE SECTION72. Peripheral nerve, HE. (low power magnification)

Axon

Myelin sheath

Perineurium

Schwann-cellnucleus

Nucleus of fibrocyte

Axon

Perineurium

Endoneurium

Myelin sheath

PERIPHERAL NERVE IN TRANSVERSE SECTION

Axon

74. Peripheral nerve, Osmium

PERIPHERAL NERVE IN LONGITUDINAL SECTION

SCHMIDT- LANTERMANN CLEFTS

PERIPHERAL NERVE IN LONGITUDINAL SECTION73. Peripheral nerve, HE.

Axon

Schwann cellnucleus

Nucleus of fibrocyte

Node of Ranvier

PERIPHERAL NERVE IN LONGITUDINAL SECTION73. Peripheral nerve, HE.

Nodes of Ranvier

Schwann cellnucleus

Nodes of Ranvier

Axon

Myelin sheath

PERIPHERAL NERVE IN LONGITUDINAL SECTION

75. Peripheral nerve, Osmium

Pseudounipolar neurons

Satellite cell nucleus

Schwann cell nucleus

GLIA CELLS IN THE PNS

GlialGlial ce llsce lls inin thethe CNSCNS are m adeare m ade o f o f as tro cyte sas tro cyte s , , o ligo de n dro cyte so ligo de n dro cyte s , ,

e pe n dym ale pe n dym al ce lls , an d ce lls , an d m icro glialm icro glialce lls .ce lls .

Main functions of the astrocytes:

-structural support

-repair processes

-blood-brain barrier

-metabolic exchanges

- scar-making cells

86. Astrocytes, GFAP

ASTROCYTES

Perivascularlimiting membrane

Astrocytes

Capillary