小肠
小肠（英语：small intestine、拉丁语：Intestinum tenue）是消化系统个一部分，从拉胃部后面一直延伸到大肠，是进行食物消化搭吸收个主要器官。对于无脊椎动物而言，一般会采用消化系统或者大肠来描述整个肠道。本篇文章主要针对人类消化系统，但对于消化过程描述也适用于胎盘哺乳动物。小肠个主要作用适用于吸收食物中个营养成分搭矿物质。
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