The autonomic nervous system is composed of neurons that are not under conscious control, and is comprised of two antagonistic components, the sympathetic and parasympathetic nervous systems. The autonomic nervous system regulates key functions including the activity of the cardiac (heart) muscle, smooth muscles (e.g. of the gut), and glands[GO].
Comment:
[homology-note] "From comparative analyses of craniate brains, a morphotype of the brain in the earliest craniate stock can be constructed. In marked contrast to cephalochordates, the ancestral craniate morphotype had a plethora of unique features, which included a telencephalon with pallial and subpallial parts, paired olfactory bulbs with substantial projections to most or all of the telencephalic pallium, paired lateral eyes and ears, a lateral line system for both electroreception and mechanoreception, spinal cord dorsal root ganglia, and an autonomic nervous system.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0000396", ontology="VHOG", source="DOI:10.1002/1097-0185(20000615)261:3<111::AID-AR6>3.0.CO;2-F Butler AB, Chordate evolution and the origin of craniates: An old brain in a new head. AnaT Rec (New Anat) (2000)", source="http://bgee.unil.ch/"}
Synonyms:
exact_synonym:
autonomic division of peripheral nervous system; autonomic part of peripheral nervous system; pars autonomica systematis nervosi peripherici; peripheral autonomic nervous system; visceral nervous system
related_synonym:
ANS; divisio autonomica systematis nervosi peripherici