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直小血管
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直小血管
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医学
直小血管
释
vasa recta
直小血管
由近髓肾单位出球小动脉分支形成的,呈U形结构,伴随髓袢下行和上行的一种球后毛细血管网。与盘绕在近曲小管周围的球后毛细血管网不同,直小血管的功能是与髓袢相互协调,参与建立和维持肾髓质间质高渗梯度,有利于肾尿液浓缩和稀释的实现。
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