nervous tissue i
DESCRIPTION
TRANSCRIPT
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
MAIN TYPES OF NEURONES, ACCORDONG TO THE MORPHOLOGY:
UNIPOLAR
BIPOLAR
MULTIPOLAR
PSEUDOUNIPOLAR
PSEUDOUNIPOLAR NEURONES
Pseudounipolar neurones(perikaryon)
Peripheral nerve fibers
76. Spinal ganglion, HE. (low power magnification)
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
MULTIPOLAR NEURONES I.
79. Autonomic ganglion, Silver-impregnation
Perikaryon
Nerve fibers
Central canal
Ventral horn(Deiters motoneurones)
Segmet
MULTIPOLAR NEURONES IIa.Deiters motoneurones
Central canal
White matter
Gray matter
Ventral horn(Deiters motoneurones)
80. Spinal cord, HE (low power magnification)
MULTIPOLAR NEURONES IIb.Deiters motoneurones
80. Spinal cord, HE (medium power magnification)
Multipolarneurones
White matter
Ventral horn
MULTIPOLAR NEURONES IIc.Deiters motoneurones
Multipolarneurone
Glial cellnucleus
Capillary
80. Spinal cord, HE (high power magnification)
MULTIPOLAR NEURONES IId.Deiters motoneurones
80. Spinal cord, HE (high power magnification)
Multipolarneurone
Nucleus
Nucleolus
Glial cellnucleus
Capillary
80. Spinal cord, HE (high power magnification)
MULTIPOLAR NEURONES IIe.Deiters motoneurones
Multipolarneurone
Glial cellnucleus
Nucleus
NucleolusNissl-substance
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
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
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