The ventral part of the cloaca remaining after septation of the rectum, which further develops into part of the bladder, part of the prostatic part of the male urethra and the urethra and vestibule in females. [ https://www.worldcat.org/search?q=bn%3A0-683-40008-8 MP:0010116 ]

Synonyms: UGS fetal UGS sinus urogenitalis

This is just here as a test because I lose it