Some articles on vesico:

Development Of The Reproductive System - Division of Cloaca - Vesico-urethral Portion
... The vesico-urethral portion is the deepest portion, continuous with the allantois ... The remainder of the vesico-urethral portion forms the body of the bladder and part of the prostatic urethra its apex is prolonged to the umbilicus as a narrow canal, the urachus ...