Sympathetic nervous system is part of the autonomic nervous system, which is responsible for governing most of the vital body functions. Sympathetic division consists of preganglionic and postganglionic nerve fibers as their integral constituents to perform its action in the target organ site. Since the sympathetic system emerges from the brain and it innervates a large group of organ sites, it has a long network of preganglionic and postganglionic nerve fibers associated with them through spinal cord.

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Chapter 15, Problem 18TYR

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Sympathetic nervous system is part of the autonomic nervous system, which is responsible for governing most of the vital body functions. Sympathetic division consists of preganglionic and postganglionic nerve fibers as their integral constituents to perform its action in the target organ site. Since the sympathetic system emerges from the brain and it innervates a large group of organ sites, it has a long network of preganglionic and postganglionic nerve fibers associated with them through spinal cord.

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