nervous system

Definitions of nervous system
1

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

Synonyms:
systema nervosum
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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