呕吐是指胃和肠内容物通过食管逆流出口腔的强力驱出动作。它的发生需要经历一系列复杂的反射过程。引起呕吐的原因是很多的。舌根、咽、食管、胃肠、胆总管、腹膜以及泌尿生殖器等处受机械和化学刺激,兴奋相应的感受器,冲动经迷走和交感神经传入纤维传到延髓外侧网状结构背外 Vomiting refers to the stomach and intestinal contents through the esophageal reflux out of the cavity of the strong drive out of action. It takes place through a series of complex reflection processes. Cause vomiting for many reasons. Tongue, pharynx, esophagus, gastrointestinal, common bile duct, peritoneum and genitourinary and other places by mechanical and chemical stimulation, the excitement of the corresponding receptors, impulse vagus and sympathetic afferent fibers spread to the medulla oblongata network back