August 21 2020 by

Urine (wee) is made in your kidneys. Long thin tubes called ureters carry the wee from your kidneys to your bladder.

Your bladder is like a muscular balloon that stretches to hold the wee.  Stretching muscles in your bladder relax to hold the wee.  Squeezing muscles in your bladder squeeze your wee out when you go to the toilet.