泌尿系统由______、______、______和______等器官组成.其结构和功能单位是______.每个这样的单位主要由

2025-03-28 10:32:56
推荐回答(1个)
回答1:

泌尿系统是由肾脏、输尿管、膀胱和尿道组成.其中主要的器官是肾脏,肾脏由大约一百万个肾单位组成,肾单位由肾小囊、肾小球、肾小管组成,肾小体由肾小囊、肾小球组成.肾脏主要作用是形成尿液,尿的形成要经过肾小球和肾小囊壁的滤过和肾小管的重吸收作用.当血液流经肾小球时,除了血细胞和大分子的蛋白质外,其他的如水、无机盐、尿素、葡萄糖会滤过到肾小囊腔形成原尿;当原尿流经肾小管时,其中大部分水、部分无机盐和全部的葡萄糖被重新吸收回血液,而剩下的如尿素、一部分无机盐和水构成了尿液的成分.输尿管把尿液运送到膀胱,膀胱的功能是暂时储存尿液,尿道的功能是排出尿液.
故答案为:肾脏;输尿管;膀胱;尿道;肾脏;肾小球、肾小囊、肾小管.

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