Index / Human Anatomy / Human Kidney
Human Anatomy
Human Kidney
Blood-filtering organ (paired)
Two bean-shaped filters that process the entire blood volume ~40 times a day. A million nephrons per kidney regulate water, electrolytes, blood pressure, and pH.
Key specifications
Mass (each)
~150 g
Nephrons
~1 million
Filtrate/day
~180 L
Urine/day
~1.5 L
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