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{
NERVOUS TISSUEPoone Shoureshi
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What were going over
CNS neurons and Glia
PNS nerves and Glia Nervous tissue in the skin Nervous tissue in
the gut
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Dorsal root ganglion
CNS NEURONS
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PNS NERVES
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{
Cross section of peripheral nerve
Nuclei of capillaryendothelium
Nuclei of endoneurial fibroblasts
Nuclei of schwann cells
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MORE PERIPHERAL NERVES
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CNS Glia
Oligodendrocytes
Astrocytes
Microglia
Ependymal cells
Found in the brain and spinal cord
Found in both gray and whitematter (EXCEPT for
ependymalcells)
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oligodendrocyte
Astrocytes
GLIAL CELLS
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Astrocytes
PROTOPLASMICGray matterBeefier cell bodies; seem lessclustered
together, more open space(less black)
FIBROUSWhite matterSmaller cell bodies; many more
tentacles,seems more like a black spider web
ASTROCYTES
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Ependymal Cells
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MICROGLIA
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SATELLITE CELLS
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SCHWANN CELLS
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DRG Distinct looking nuclei;
centrally placed.
Variable cell sizes
AUTONOMIC Cell sizes are fairly uniform
Neuronal cells tend to havelipofuscin (brown granules)
Looks more busy andclustered together
DORSAL ROOT GANGLION VS.AUTONOMIC GANGLION
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NERVOUS TISSUE IN THE SKIN:MEISSNER CORPUSCLE
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NERVOUS TISSUE IN THE SKIN CONT:PACINIAN CORPUSCLE
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NERVOUS TISSUE IN THE GUT
Submucosal
(Meissner)
plexus
Parasympathetic neuron
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Parts of a Neuron: Cell body (soma) Axon Dendrite Myelin Sensory
receptor Motor end plate CNS vs PNS neurons Glial cell Nodes of
Ranvier
In CNS: Astrocytes Oligodendroglia
Microglia Ependymal cells (and choroid plexus
epithelium)
In PNS: Satellite cells
Schwann cells
Histological Organization:
Fascicles Perineurium Epineurium Endoneurium Endoneural
fibroblasts
Nervous Tissue in Skin and Gut Myenteric Plexus Submucosal
Plexus Pacinian Corpuscle Meissner Corpsucle
Autonomic ganglia vs. DRG
KEY TERMS
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QUICK QUIZ!
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What is this cell?
B
A
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B
A
B
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A
B
