Health
Ureters forcefully push liquid downward
HERE’S THE INTERESTING PART
Urine does not just passively fall from the kidneys into the bladder via gravity; it is actively shoved. The ureters are muscular tubes that violently squeeze liquid downward using rhythmic, wave-like contractions. This means that even if you were hanging completely upside down from a tree, your internal plumbing would still forcefully pump liquid waste straight into your bladder against gravity.
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