Urinary System, Part 2: Crash Course Anatomy & Physiology #39
Why the open web links it
Explains how the urinary system regulates urine production and the anatomy of urine storage and excretion.
Linked by 8 independent sites, 2 of them widely read in the 2026-10 crawl of the open web, including ubc.ca, unh.edu, libretexts.org, pressbooks.pub, baker.edu.