A part of nervous system that serves to accelerate the heart rate, constrict blood vessels, and raise blood pressure. The sympathetic nervous system, together with the parasympathetic nervous system (that slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles), constitutes the autonomic nervous system.
SYMPATHETIC NERVOUS SYSTEM
Meaning of SYMPATHETIC NERVOUS SYSTEM in English
English dictionary of medicine. Английский словарь медицины. 2012