A nephron is a tiny filter in the kidney, with a complicated structure of tubules and a glomerulus that I have come to know too well from my daughter's reports. The diagrams show a neat loop, but in our life, it is the site of a stubborn blockage she was born with. So for me, its primary function is not just filtration, but a fragile balance we maintain with strict diets and prayers, hoping it will hold.
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