副交感神经 fùjiāogǎnshénjīng parasympathetic nervous system Origin Definitions Defs Strokes Stroke Words Sentences Sents 副 fù adjective vice- deputy; assistant; secondary; auxiliary; subsidiary交感神经 交感神經 jiāogǎnshénjīng sympathetic nervous system Part of the autonomic nervous system that regulates internal organs and involuntary functions like heart rate and blood pressure; it works in opposition to the 副交感神经 fùjiāogǎnshénjīng