Video - Peripheral nervous system histology
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Video Summary
The peripheral nervous system (PNS) consists of all the nerves and ganglia outside the brain and spinal cord. The peripheral nerves consist of at least one bundle of nerve fibers called a fascicle, surrounded by an outer layer called epineurium. Fascicles within nerves are in turn surrounded by the perineurium, whereas individual nerve fibers are surrounded by the endoneurium. Ganglia are clusters of nerve cells found along the length of peripheral nerves, serving as relay stations for the transmission of nerve impulses.
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