The parasympathetic nervous system (PSNS) is one of three divisions of the autonomic nervous system (ANS). The ANS -a subdivision of the peripheral nervous system (PNS)- is subdivided into the sympathetic (SNS), parasympathetic (PSNS) and enteric (bowels) nervous system (ENS).
Ganglion Peripheral nervous system Sympathetic nervous system Dermatome (anatomy) Sacral Bronchoconstriction Viscus Referred pain Peritoneal cavity Preganglionic fibers Postganglionic fibers Atrioventricular node Atrium (heart) Cholinergic Sinoatrial node Ophthalmic nerve Enteric nervous system Maxillary nerve Nicotinic acetylcholine receptor Cardiac muscle Cholecystokinin Salivary gland Chemical synapse Glossopharyngeal nerve Oculomotor nerve Mandibular nerve Trigeminal nerve Vasodilator Gland Smooth muscle Autonomic nervous system Facial nerve Vagus nerve Acetylcholine Muscarinic acetylcholine receptor Neurotransmitter Peptide Gastrointestinal tract Spinal cord Nervous system
