肾小管液（Tubular fluid）为肾脏的小管之流体。它在肾小球进行超滤作用，改变通过肾单位的流体成分，并通过输尿管最终变为尿液。
成分表
通过肾单元之肾小管液从近曲小管流至集合小管(collecting duct system/集水系统)其成分改变，然后从输尿管离开身体。
注释
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