Sympathicus and Parasympathicus

Our sympathetic nervous system (SNS) is best known for responding to dangerous or stressful situations. In these situations, our sympathetic nervous system activates to speed up the heart rate, deliver more blood to areas of our body that need more oxygen or other responses to help us get out of danger.

The parasympathetic nervous system (PNS) predominates in quiet “rest and digest” conditions , while the sympathetic nervous system drives the “fight or flight” response in stressful situations. The primary purpose of the PNS is to conserve energy to be used later and to regulate bodily functions like digestion and urination.

Together with the enteric nervous system, they belong to the autonomic nervous system (ANS), formerlythe vegetative nervous system (see Wikipedia).

The two counterparts complement each other. It’s like in life; it’s not to compete; it’s to complete each other. I hope this helps you!