Eli5: How does our bladder avoid low pressure when we’re peeing?

Question

Eli5: How does our bladder avoid low pressure when we’re peeing?

In: Biology

Answer 1

When you have a solid tank full of liquid, the pressure gets lower as the volume of liquid gets lower. When you have an elastic container like a balloon full of liquid, as long as it’s stretched out, even a little by the volume of liquid, the internal tension on the material trying to stretch back to its unstretched size will keep the pressure pretty high. Think of your bladder like a water balloon, and not a water bottle