The liver is a chemistry lab. It does lots of things, but one thing it does is take in blood ands breaks down stuff carried in the blood and makes it dissolve better in water (blood’s mostly water).
The kidney is a filter that blood goes through and water mixed with waste (a lot of which is stuff broken up and made easy to dissolve in water by the liver) comes out: pee, which collects in you bladder until it starts to fill up and you pee it out.
The work together.
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