this fluid passes through this winding set of tubes,

液体流过一套弯曲的导管
these winding set of tubules; these are called the kidney tubules.

这些弯曲的导管称为肾小管
This is not blood that's flowing through here now,

现在这里流的不是血液
but this is the fluid that wants to be urine.

而是将成为尿液的液体
It flows through--these tubules in the kidney are divided into segments.

它流过这些在肾脏中分成很多段的导管中
The first segment is called the proximal convoluted tubule.

第一段称为近曲小管
It's called convoluted because it twists around,

被叫做"曲"是因为它是缠绕在一块的
it's proximal because proximal means near,

它"近"是因为这个词的意思是接近
and this part of the tube is near the glomerulus.

而且这部分的导管接近肾小球
Proximal convoluted tubule,

近曲小管
the fluid flows through; it flows down this loop

液体从中流过并向下流到这个环
and this loop extends from the top near the cortex of the kidney

这个环从肾脏皮层的附近开始延伸