第四节小肠内消化食糜由胃进入十二指肠后,开始了小肠内的消化。食物在小肠内消化是重要的消化过程。在这里,食物受到胰液、胆汁和小肠液的化学作用,以及小肠运动的机械作用,营养物质主要在这里被吸收进入机体。食物通过小肠后,消化过程基本完成,只留着未经消化的食物残渣,从小肠进入大肠。 Section IV digestion of small intestine Chymese enter the duodenum from the stomach, began digestion within the small intestine. Digestion of food in the small intestine is an important digestive process. Here, the food is subjected to the chemical action of pancreatic juice, bile and small intestinal fluid, and the mechanical action of the small intestine, where nutrients are mainly absorbed into the body. After the food through the small intestine, the digestion process is basically completed, leaving only the food residue without digestion, enter the large intestine from the small intestine.