The Parasympathetic Nervous System: Structure, Function, and Physiological Role

Medical illustration of the parasympathetic nervous system showing craniosacral outflow pathways extending from the brainstem and sacral spinal cord to internal organs.

Table of Contents The parasympathetic nervous system (PNS) represents one of the two primary divisions of the autonomic nervous system (ANS), the intricate network responsible for regulating the body’s involuntary functions. Working in concert with its counterpart, the sympathetic nervous system (SNS), the PNS is instrumental in maintaining the body’s internal balance, a state known […]