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|Noun||1.||systema nervosum - the sensory and control apparatus consisting of a network of nerve cells|
body, organic structure, physical structure - the entire structure of an organism (an animal, plant, or human being); "he felt as if his whole body were on fire"
system - a group of physiologically or anatomically related organs or parts; "the body has a system of organs for digestion"
ganglion - an encapsulated neural structure consisting of a collection of cell bodies or neurons
central nervous system, CNS, systema nervosum centrale - the portion of the vertebrate nervous system consisting of the brain and spinal cord
neural net, neural network - any network of neurons or nuclei that function together to perform some function in the body
peripheral nervous system, systema nervosum periphericum - the section of the nervous system lying outside the brain and spinal cord
ANS, autonomic nervous system - the part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glands
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