来自《耶鲁大学开放课程：生物医学工程探索 第16集 第16集》
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that each of your two kidneys receives 1,700 liters每个肾脏每天从主动脉 -
of blood per day which flows continuously接收1700升持续的血流 -
from the aorta into the renal arteries.至肾动脉 -
Of that,the blood is composed of blood cells and plasma,其中 血液由血细胞以及血浆所构成 -
so if we just looked at the plasma about half of that如果我们只是看血浆 -
volume slightly more than half of that volume is plasma.大概比一半体积稍稍多一点的是血浆 -
What's in plasma?血浆中含有什么 -
Mainly water,大部分是水 -
proteins like albumin and antibodies,像白蛋白和抗体的蛋白质 -
and salts like sodium and potassium bicarbonate,还有像碳酸氢钾和碳酸氢钠的盐类 -
and waste products like urea.另外还有像尿素这样的废物 -
If we measured what the concentration was如果我们测量肾动脉中