With a longer urethra, the effects of gravity increase, which creates more pressure in the bladder and pushes the urine out faster, the researchers said.
The findings, which were detailed online last week in the Proceedings of the National Academy of Sciences, suggest the urethra isn't merely a conduit between the bladder and the outside world. Hu and his colleagues think this efficient biological system could be useful in the engineering world, and could even be scaled up.
"We realized that this phenomenon had no size limit," Hu said. "Animals use it for 5-mL or 18-L bladders, but there is no reason that it could not be extended to larger systems like swimming pools."
Original article on Live Science.
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