What Do the Kidneys Do?

At some point I need to populate the page /About/Kidneys

I'll get around to it myself but it is probably one of the less involved ones and someone could pick that up with information from the web in the mean time if they wanted?

Open /About/Kidneys first and inspect the page's current state. Gather reliable web information explaining kidney function, then populate the page with a clear explanation; done means the page is no longer empty and presents the requested content.

Written by the indexing model from the issue text.