我们吃下的食物经过消化、吸收,成为食物残渣进入大肠,经过大肠内细菌的发酵和腐败,就变成了粪便。粪便除了包含食物残渣外,还包括脱落的肠粘膜上皮细胞和大量细菌,另外机体代谢的废物也随粪便排出体外。 食物残渣是粪便的核心内容物,主要是粗粮、蔬菜中的纤维素。膳食纤维是膳 We eat the food after digestion and absorption, as food residue into the large intestine, after the fermentation of the large intestine and corruption, it becomes stool. Excrement includes not only food waste, but also exfoliated intestinal mucosa epithelium and a large number of bacteria. In addition, the waste products metabolized by the body are excreted with the excrement. Food debris is the core content of manure, mainly coarse grains, vegetables, cellulose. Dietary fiber is meal