The part of the vertebrate nervous system that regulates involuntary action, as of the intestines, heart, and glands, and that is divided into the sympathetic nervous system and the parasympathetic nervous system.自主神经系统:脊椎动物神经系统的一部分,它调节不自觉的运动,如小肠,心脏,和腺体,由交感神经系统和副交感神经系统组成