We found 4 definitions of ans from 4 different sources.
Noun |
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ans - the part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glands | ||
autonomic nervous system, ANS | ||
neural structure a structure that is part of the nervous system | ||
nervous system, systema nervosum the sensory and control apparatus consisting of a network of nerve cells | ||
autonomic ganglion any of the ganglia of the autonomic system whose unmyelinated fibers innervate the internal organs | ||
sympathetic nervous system originates in the thoracic regions of the spinal cord; opposes physiological effects of the parasympathetic: reduces digestive secretions; speeds the heart; contracts blood vessels |