The<unk>  (PSNS) is one of three divisions of the autonomic<unk><unk>  (ANS). The ANS—a subdivision of the peripheral<unk><unk>  <unk> —is subdivided into the sympathetic (SNS),<unk>  (PSNS) and enteric (bowels)<unk><unk>  (ENS).
Parasympathetic nervous system
Sympathetic nervous system
Autonomic nervous system
Central chemoreceptors
Vestibular system
Lymph vascular system
Circulatory system
Electrical conduction system of the heart