Nervous system

/ˌnʌrvəs ˈsɪstəm/

/ˈnʌvəs ˈsɪstəm/

IPA guide

Other forms: nervous systems

Definitions of nervous system

noun
the sensory and control apparatus consisting of a network of nerve cells

synonyms: systema nervosum

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types:
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

parasympathetic, parasympathetic nervous system
originates in the brain stem and lower part of the spinal cord; opposes physiological effects of the sympathetic nervous system: stimulates digestive secretions; slows the heart; constricts the pupils; dilates blood vessels

type of:
system
a group of physiologically or anatomically related organs or parts

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