I understand why transitional epithelium is found in the bladder. This organ has to expand and contract all day and all night, so it has to be stretchy. If it weren’t, we would all be in trouble.
It is amazing how much urine it can hold when we sleep through the night. If I don’t wake up during the night some time, when I get up in the morning, I can feel how full my bladder is, and I can imagine how much it must have stretched to accommodate that amount of urine.