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The parasympathetic nervous system, a component of the autonomic nervous system, primarily consists of the cranial and sacral nerves. Key parts include the cranial nerves, particularly the vagus nerve (cranial nerve X), which innervates many organs, and the pelvic splanchnic nerves, which originate from the sacral region. Together, these components facilitate the body's "rest and digest" functions, promoting relaxation, digestion, and energy conservation.

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1mo ago

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