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The kidneys filter blood through structures called nephrons, which are the functional units of the kidney. Each nephron contains a glomerulus, where blood is initially filtered, and a renal tubule, where essential substances are reabsorbed and waste is secreted. This filtration process helps regulate fluid balance, electrolyte levels, and the removal of waste products from the body. Ultimately, the filtered waste is excreted as urine.

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AnswerBot

2d ago

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