Nerve Tissue 2 Histology

NEUROGLIA GLIA CELLS IN THE PNS

GLIA CELLS IN THE CNS

- Schwann cell

- Oligodendrocytes

- Satellite cell

- Microglia - Astrocyte - Ependyma

Myelin formation in nerve fibers: Schwann-cell

Oligodendrocyte

(PNS)

(CNS)

PERIPHERAL NERVE IN TRANSVERSE SECTION

PERIPHERAL NERVE IN TRANSVERSE SECTION Paraneurium

Epineurium Perineurium

Adipose tissue

Artery, Vein

Endoneurium

PERIPHERAL NERVE IN TRANSVERSE SECTION 72. Peripheral nerve, HE. (low power magnification)

Perineurium

Schwann-cell nucleus

Axon Myelin sheath

Nucleus of fibrocyte

PERIPHERAL NERVE IN TRANSVERSE SECTION 74. Peripheral nerve, Osmium

Axon

Myelin sheath

Axon

Endoneurium Perineurium

PERIPHERAL NERVE IN LONGITUDINAL SECTION

SCHMIDT- LANTERMANN CLEFTS

PERIPHERAL NERVE IN LONGITUDINAL SECTION 73. Peripheral nerve, HE.

Nucleus of fibrocyte

Node of Ranvier

Axon

Schwann cell nucleus

PERIPHERAL NERVE IN LONGITUDINAL SECTION 73. Peripheral nerve, HE.

Schwann cell nucleus

Nodes of Ranvier

PERIPHERAL NERVE IN LONGITUDINAL SECTION 75. Peripheral nerve, Osmium

Nodes of Ranvier

Axon

Myelin sheath

GLIA CELLS IN THE PNS

Pseudounipolar neurons

Satellite cell nucleus

Schwann cell nucleus

Glial ce lls in th e CN S are m ad e o f as tro cyte s , o ligo d e n d ro cyte s , e p e n d ym al ce lls , an d m icro glial ce lls .

Main functions of the astrocytes: -structural support -repair processes -blood-brain barrier -metabolic exchanges - scar-making cells

ASTROCYTES 86. Astrocytes, GFAP

Capillary

Astrocytes

Perivascular limiting membrane