nervous tissue i
DESCRIPTION
TRANSCRIPT
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Ne uro n sNe uro n s
Neural tissue consistsNeural tissue consists of:of:
n e uro n sn e uro n s and and glialglial ce llsce lls
GlialGlial Ce llCe ll
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MAIN TYPES OF NEURONES, ACCORDONG TO THE MORPHOLOGY:
UNIPOLAR
BIPOLAR
MULTIPOLAR
PSEUDOUNIPOLAR
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PSEUDOUNIPOLAR NEURONES
Pseudounipolar neurones(perikaryon)
Peripheral nerve fibers
76. Spinal ganglion, HE. (low power magnification)
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PSEUDOUNIPOLAR NEURONES
76. Spinal ganglion, HE. (high power magnification)
Pseudounipolar neurones-perikaryon(nucleus, nucleolus)
Axon
Peripheral nerve fibers
Satellite cell nucleus
Schwann cell nucleus
A-cellD-cell
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MULTIPOLAR NEURONES I.
79. Autonomic ganglion, Silver-impregnation
Perikaryon
Nerve fibers
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Central canal
Ventral horn(Deiters motoneurones)
Segmet
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MULTIPOLAR NEURONES IIa.Deiters motoneurones
Central canal
White matter
Gray matter
Ventral horn(Deiters motoneurones)
80. Spinal cord, HE (low power magnification)
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MULTIPOLAR NEURONES IIb.Deiters motoneurones
80. Spinal cord, HE (medium power magnification)
Multipolarneurones
White matter
Ventral horn
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MULTIPOLAR NEURONES IIc.Deiters motoneurones
Multipolarneurone
Glial cellnucleus
Capillary
80. Spinal cord, HE (high power magnification)
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MULTIPOLAR NEURONES IId.Deiters motoneurones
80. Spinal cord, HE (high power magnification)
Multipolarneurone
Nucleus
Nucleolus
Glial cellnucleus
Capillary
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80. Spinal cord, HE (high power magnification)
MULTIPOLAR NEURONES IIe.Deiters motoneurones
Multipolarneurone
Glial cellnucleus
Nucleus
NucleolusNissl-substance
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NEUROGLIA
GLIA CELLSIN THE PNS
GLIA CELLSIN THE CNS
- Schwann cell
- Satellite cell
- Oligodendrocytes
- Microglia
- Astrocyte
- Ependyma
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Myelin formation in nerve fibers:
Schwann-cell(PNS)
Oligodendrocyte(CNS)
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PERIPHERAL NERVE IN TRANSVERSE SECTION
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PERIPHERAL NERVE IN TRANSVERSE SECTION
ParaneuriumEpineurium
Perineurium
EndoneuriumAdipose tissue
Artery, Vein
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PERIPHERAL NERVE IN TRANSVERSE SECTION72. Peripheral nerve, HE. (low power magnification)
Axon
Myelin sheath
Perineurium
Schwann-cellnucleus
Nucleus of fibrocyte
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PERIPHERAL NERVE IN LONGITUDINAL SECTION
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SCHMIDT- LANTERMANN CLEFTS
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PERIPHERAL NERVE IN LONGITUDINAL SECTION73. Peripheral nerve, HE.
Axon
Schwann cellnucleus
Nucleus of fibrocyte
Node of Ranvier
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PERIPHERAL NERVE IN LONGITUDINAL SECTION73. Peripheral nerve, HE.
Nodes of Ranvier
Schwann cellnucleus
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Pseudounipolar neurons
Satellite cell nucleus
Schwann cell nucleus
GLIA CELLS IN THE PNS
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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 .
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Main functions of the astrocytes:
-structural support
-repair processes
-blood-brain barrier
-metabolic exchanges
- scar-making cells
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86. Astrocytes, GFAP
ASTROCYTES
Perivascularlimiting membrane
Astrocytes
Capillary