来自《耶鲁大学开放课程：生物医学工程探索 第17集 第17集》

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  going up and down in this diagram.
  向上或向下走行
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  That's the reason why I turned this kidney on its side
  这便是为什么我将肾结构图转向这边
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  so when you look at the nephron here
  目的是当你观察这里的肾单位时
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  you can think about it sitting in this orientation in the kidney.
  你可以认为它处在肾脏的这一方向上
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  Of course, the kidney has this sort of curved structure
  当然 肾脏有着这种弯曲的结构
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  so the nephrons are going to sort of radiate out from the central portion
  因此肾单位从中心向外呈放射状分布
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  through the medulla and up into the cortex,
  穿过髓质向上延伸进入皮质
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  with the glomerulus near the cortex,
  以及靠近皮质的肾小球
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  and the Loop of Henle stretching down into the medulla.
  再向下延伸进入髓质的亨利氏环
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  I also mentioned several features of the nephron.
  我同样提到过一些肾单位的特征
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  this tuft of capillaries that's surrounded by a capsule.
  这一毛细血管簇由囊包被着
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  The capsule is there to catch this filtrate
  那个囊是用来收集