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Dictionary of Cancer Terms

View in Spanish: Sistema nervioso parasimpático

Parasympathetic nervous system (PA-ruh-SIM-puh-THEH-tik NER-vus SIS-tem)
The part of the nervous system that slows the heart, dilates blood vessels, decreases pupil size, increases digestive juices, and relaxes muscles in the gastrointestinal tract.

Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.