Which organs filter blood and produce urine?
AnswerThe kidneys
The kidneys filter waste and extra water out of the blood, producing urine.
Health · Facts & stats
Detox facts & stats
7 fact-checked facts about how the body clears waste, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What is a "digital detox"?
AnswerA break from phones, screens and other digital devices
A digital detox is a period of stepping away from screens and online activity.
Going deeper
What are the tiny filtering units inside the kidneys called?
AnswerNephrons
Each kidney contains about a million nephrons that filter blood and form urine.
What is the main job of sweating?
AnswerCooling the body as sweat evaporates
Sweat is mostly water that cools the skin as it evaporates; the kidneys and liver handle most waste.
What is unusual about the liver compared with most organs?
AnswerIt can regrow lost tissue
The liver can regenerate, regrowing to near its full size after part of it is removed.
Expert level
About how much fluid do healthy adult kidneys filter from the blood each day?
AnswerAbout 180 liters
The kidneys filter around 180 liters a day but reabsorb nearly all of it, leaving about 1-2 liters of urine.
What is the tiny cluster of capillaries where kidney filtration begins called?
AnswerThe glomerulus
Blood is filtered in the glomerulus, a ball of capillaries at the start of each nephron.
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