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Glial Ce ll
              Neural tissue consists of:
          n e u ro n s and glial ce lls




                      N e u ro n s
MAIN TYPES OF NEURONES,
ACCORDONG TO THE MORPHOLOGY:
UNIPOLAR



BIPOLAR




PSEUDOUNIPOLAR




MULTIPOLAR
PSEUDOUNIPOLAR NEURONES

76. Spinal ganglion, HE. (low power magnification)



     Pseudounipolar neurones
           (perikaryon)




                     Peripheral nerve fibers
PSEUDOUNIPOLAR NEURONES

       76. Spinal ganglion, HE. (high power magnification)

Pseudounipolar neurones-perikaryon
(nucleus, nucleolus)
                                             Satellite cell nucleus




Peripheral nerve fibers        A-cell
                                          D-cell




             Axon


                          Schwann cell nucleus
MULTIPOLAR NEURONES I.
        79. Autonomic ganglion, Silver-impregnation




Perikaryon

                           Nerve fibers
Central canal




      Ventral horn
(Deiters motoneurones)



      Segmet
MULTIPOLAR NEURONES IIa.
               Deiters motoneurones

  80. Spinal cord, HE (low power magnification)


                 Central canal




                           Gray matter




White matter

                     Ventral horn
               (Deiters motoneurones)
MULTIPOLAR NEURONES IIb.
                    Deiters motoneurones

      80. Spinal cord, HE (medium power magnification)




Multipolar
neurones                                           Ventral horn




                       White matter
MULTIPOLAR NEURONES IIc.
                         Deiters motoneurones


            80. Spinal cord, HE (high power magnification)



            Multipolar
             neurone




                                                             Glial cell
                                                             nucleus




Capillary
MULTIPOLAR NEURONES IId.
                        Deiters motoneurones

            80. Spinal cord, HE (high power magnification)




                                 Nucleus




                Multipolar
                 neurone
                                    Nucleolus



                                                             Glial cell
                                                             nucleus
Capillary
MULTIPOLAR NEURONES IIe.
                  Deiters motoneurones

     80. Spinal cord, HE (high power magnification)




                                           Glial cell
                                           nucleus
Multipolar
 neurone



                                            Nissl-substance
 Nucleolus



     Nucleus
NEUROGLIA

GLIA CELLS                GLIA CELLS
IN THE PNS                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                                Endoneurium




Artery, Vein
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 LONGITUDINAL SECTION
SCHMIDT- LANTERMANN CLEFTS
PERIPHERAL NERVE IN LONGITUDINAL SECTION
                        73. Peripheral nerve, HE.




Nucleus of fibrocyte




                       Node of Ranvier              Schwann cell
                                                      nucleus

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




                                         Schwann cell
                                           nucleus




     Nodes of Ranvier
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

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Nervous tissue i

  • 1.
  • 2. Glial Ce ll Neural tissue consists of: n e u ro n s and glial ce lls N e u ro n s
  • 3. MAIN TYPES OF NEURONES, ACCORDONG TO THE MORPHOLOGY: UNIPOLAR BIPOLAR PSEUDOUNIPOLAR MULTIPOLAR
  • 4. PSEUDOUNIPOLAR NEURONES 76. Spinal ganglion, HE. (low power magnification) Pseudounipolar neurones (perikaryon) Peripheral nerve fibers
  • 5. PSEUDOUNIPOLAR NEURONES 76. Spinal ganglion, HE. (high power magnification) Pseudounipolar neurones-perikaryon (nucleus, nucleolus) Satellite cell nucleus Peripheral nerve fibers A-cell D-cell Axon Schwann cell nucleus
  • 6. MULTIPOLAR NEURONES I. 79. Autonomic ganglion, Silver-impregnation Perikaryon Nerve fibers
  • 7. Central canal Ventral horn (Deiters motoneurones) Segmet
  • 8. MULTIPOLAR NEURONES IIa. Deiters motoneurones 80. Spinal cord, HE (low power magnification) Central canal Gray matter White matter Ventral horn (Deiters motoneurones)
  • 9. MULTIPOLAR NEURONES IIb. Deiters motoneurones 80. Spinal cord, HE (medium power magnification) Multipolar neurones Ventral horn White matter
  • 10. MULTIPOLAR NEURONES IIc. Deiters motoneurones 80. Spinal cord, HE (high power magnification) Multipolar neurone Glial cell nucleus Capillary
  • 11. MULTIPOLAR NEURONES IId. Deiters motoneurones 80. Spinal cord, HE (high power magnification) Nucleus Multipolar neurone Nucleolus Glial cell nucleus Capillary
  • 12. MULTIPOLAR NEURONES IIe. Deiters motoneurones 80. Spinal cord, HE (high power magnification) Glial cell nucleus Multipolar neurone Nissl-substance Nucleolus Nucleus
  • 13. NEUROGLIA GLIA CELLS GLIA CELLS IN THE PNS IN THE CNS - Schwann cell - Oligodendrocytes - Satellite cell - Microglia - Astrocyte - Ependyma
  • 14. Myelin formation in nerve fibers: Schwann-cell Oligodendrocyte (PNS) (CNS)
  • 15. PERIPHERAL NERVE IN TRANSVERSE SECTION
  • 16. PERIPHERAL NERVE IN TRANSVERSE SECTION Paraneurium Epineurium Perineurium Adipose tissue Endoneurium Artery, Vein
  • 17. PERIPHERAL NERVE IN TRANSVERSE SECTION 72. Peripheral nerve, HE. (low power magnification) Perineurium Schwann-cell nucleus Axon Myelin sheath Nucleus of fibrocyte
  • 18. PERIPHERAL NERVE IN LONGITUDINAL SECTION
  • 20. PERIPHERAL NERVE IN LONGITUDINAL SECTION 73. Peripheral nerve, HE. Nucleus of fibrocyte Node of Ranvier Schwann cell nucleus Axon
  • 21. PERIPHERAL NERVE IN LONGITUDINAL SECTION 73. Peripheral nerve, HE. Schwann cell nucleus Nodes of Ranvier
  • 22. GLIA CELLS IN THE PNS Pseudounipolar neurons Satellite cell nucleus Schwann cell nucleus
  • 23. 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 .
  • 24. Main functions of the astrocytes: -structural support -repair processes -blood-brain barrier -metabolic exchanges - scar-making cells
  • 25. ASTROCYTES 86. Astrocytes, GFAP Capillary Astrocytes Perivascular limiting membrane