Parasympathetic nervous system
The parasympathetic nervous system, also called parasympathetic nervous system, is an efferent peripheral nervous system that forms the autonomic nervous system along with the sympathetic nervous system. Parasympathetic nerves have an antagonistic relationship with sympathetic nerves. When the parasympathetic nerves are excited, the body relaxes, such as pulse reduction, blood pressure reduction, and digestion. The backbone is located in the sacral area of the brain or spinal cord. The parasympathetic nerves from the brain stem enter the brain, and the parasympathetic nerves from the sacrum regulate the pelvic organ. At this time, from the central to the organ, it connects to two neurons. Neurons close to the center are power saving neurons, and neurons close to the organ are termed posterior neurons. In general, parasympathetic nerves are relatively short compared to power saving neurons. Sympathetic nerve is the opposite.