Description
本期节目，来看看我们吃进去的食物在消化道经过了怎样的旅程。当我们进食后，食物会先后经过口腔、食管、胃、小肠、大肠，一步步被消化吸收，最终残余部分会转变粪便排出体外。首先通过咀嚼和唾液完成对食物的初步分解，然后把这些食物吞咽入胃，进一步消化，后进入肠道。在小肠中，来自肝脏和胰腺的消化液与食物混合在一起，随着小肠的蠕动，混合物被不断地搅拌，最终被分解为小分子物质。随后，小分子物质被小肠上皮吸收，并随血流到达身体各部位需要能量的器官。消化后剩下的水样食物残渣和分泌液接着排入大肠，进一步吸收水分后形成大便排出体外。——本集内容感谢郑晶晶，王英医师供稿
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