sympathetic nervous system
Cancer
(SIM-puh-THEH-tik NER-vus SISS-tum) The part of the nervous system that increases heart rate, blood pressure, breathing rate, and pupil size. It also causes blood vessels to narrow and decreases digestive juices.
(SIM-puh-THEH-tik NER-vus SISS-tum) The part of the nervous system that increases heart rate, blood pressure, breathing rate, and pupil size. It also causes blood vessels to narrow and decreases digestive juices.