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Summary: The Two Branches Of The ANS System

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The two branches of the ANS system are SNS which stands for sympathetic nervous system and the PNS which stands for parasympathetic nervous system. The SNS triggers the “fight or flight” response, it originated in the spinal cord. SNS prepares the body to put our energy and to protect it from effects of injury. SNS shuts the gut down, speeds up the heart, increases blood pressure, dilates pupils, makes more glucose available in the blood for energy. PNS is sometimes referred to as the “rest and digest” system. The PNS acts to replace and recover from the activities of living. The PNS acts in the opposite of SNS, but they are complementary to one another.

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