+The **Parasympathetic Nervous System** is a division of the [Autonomic Nervous System](/wiki/autonomic_nervous_system) that governs the body's "rest and digest" functions. It works to conserve energy, slowing heart rate and promoting digestion, often acting in opposition to the [Sympathetic Nervous System](/wiki/sympathetic_nervous_system) to maintain internal balance.
+## See also
+- [Autonomic Nervous System](/wiki/autonomic_nervous_system)
+- [Sympathetic Nervous System](/wiki/sympathetic_nervous_system)
+- [Nervous System](/wiki/nervous_system)
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