Nervous tissue and system 

The picture " " can link to it's
corresponding histological photograph. 

The picture " " can link to it's
corresponding histological drawing.

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I. PNS

   A. Pseudounipolar neuron in the spinal ganglion

F-1-d, Spinal ganglion, LS, HE for demonstration only
NT-1-e, Spinal cord and ganglion, CS, Silver stain

»»  Neuron perikaryon: Nucleus;Nucleolus;Nissl's bodies(finelygranular)
»»  Satellite cells-nuclei are round and much smaller
»»  Connective tissue cell-fibroblast with flattened nuclei
»»  Myelinated nerve fibers ( LS & CS )
»»  Axons - light pink
»»  Myelin sheath- a neurokeratin network due to the dissolution of myelin (empty space)
 »»  Neurilemma ( Schwann sheath )
 »»  Node of Ranvier

 
 * in NT-1-e Ganglion cell: Perikaryon: brown Nucleus: pale Nerve fiber: brown

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   B. NF-1-b, Sympathetic ganglion, human, HE


»»  Multipolar neurons and more widelyspaced than spinal ganglion
»»  Eccentrically located nuclei
»»  Cytoplasm - lipofuscin granules
»»  Satellite cells are smaller in number and irregular place

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   C. Parasympathetic ganglion


»»  Myenteric plexus of Auerbach: 
      NN-10-c (Esophagus, lower region)
»»  The plexus are found between outer and inner muscular layer

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   D. Peripheral nerve
      F-3-i Peripheral nerve, CS & LS, OsO4
        F-3-k Peripheral nerve, CS & LS, OsO4


(a) Cross section

»»  Myelin sheaths- black
»»  Schwann cell nuclei-randomly placed at the periphery of the cross section
»»  Neurolemma and endoneurium
»»  Perineurium
»»  Epineurium
»»  Capillaries
»»  Fat cells-stained black in F-3-k

(b) Longitudinal section

»»  Axon - greyish
»»  Myelin sheath - black in OsO4
»»  Node of Ranvier
»»  Endoneurium
»»  Epineurium
»»  Perineurium
»»  Capillaries

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II. CNS

   A. Spinal cord

NF-1-a, Spinal ganglion, Silver stain
NT-1-e, Spinal cord, Silver stain

Pia mater

Gray matter

»»  Multipolar neurons ( in anterior, lateral and posterior horns)
»»  Neuroglia
»»  Neuropil
»»  Blood vessels

White matter

»»  Mostly myelinated nerve fibers
»»   Neuroglia nuclei
»»   Central canal
»»   Ependymal cells with cilia

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   B. Cerebrum

Mylinated nerve fibers are deep stained and distributed in white matter & gray matter.
T-4-c, HE
NT-7-f, Human, Silver stain

Pia mater ( with blood vessels )

Gray matter

»»  Pyramidal cells
»»  Neuroglia
»»  Blood vessel

White matter

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   C. Cerebellum

T-7-d, HE
NT-7-e, Bielschowsky stain
NT-7-h, Silver stain, Human

Pia mater

Gray matter

»»  Molecular layer
 ¡@Few cells & unmyelinated nerve fibers
»»  Purkinje layer
¡@Purkinje cells ( in single row of large flask-shaped neurons )
»»  Granular layer
¡@Mostly granule cells with scanty cytoplasm

White matter

»»  Myelinated nerve fibers
»»  Neuroglia
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