What is bladder ?
Pee is one of the first body fluids a kid learn about.
You probably learned about pee (also called urine) when you were 2 or so, when you started using the toilet instead of diapers.
Now that you’re older, you can understand much more about the amazing yellow stuff called pee.
All day long, a small stream of urine trickles down each kidney.
It’s collected in an organ called the bladder, which stores the urine until you go to the toilet.
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