Why don't our bodies swell and pop when we jump swimming when a pool is hypotonic to our cell and body fluids?

they do, just not to that extent.our fingers and toes wrinkle.as you could see if youve ever taken a tub for too long
because we have a skin that prevents this from taking place
Because our skin is waterproof and doesn't allow much exchange between what is contained by our bodies and outside of it.
Our skin does not allow contact directly to the cell.
the integument (skin) is a natural, wonderful, rail