The parasympathetic nervous system is used in times of relaxation.
The parasympathetic nervous system is a network of nerves that help the body to relax after exposure to stress or danger. It also helps sustain life-supporting processes such as digestion when you are safe and relaxed. Informal descriptions of this system include the rhymes "rest and digest" or "feed and breed."
The parasympathetic nervous system is part of the autonomic nervous system. It is often called the "automatic" nervous system because it is responsible for many functions that you don't have to think about controlling. The parasympathetic portion of the autonomic nervous system balances the sympathetic nervous system. The sympathetic nervous system controls the body's "fight or flight" response, while the parasympathetic nervous system helps control the body's response during rest.
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