Final answer:
The urorectal septum divides embryonic cloacal tissue into the urinary bladder, the anorectal canal, and the urethra during development.
Step-by-step explanation:
The urorectal septum is a structure in embryonic development that divides cloacal tissue into three parts: the urinary bladder, the anorectal canal, and the urethra. This septum forms as the embryo develops and is essential for the proper partitioning of the urogenital and gastrointestinal systems. The division it creates ensures that the urinary and fecal discharge pathways are separate, which is crucial for the normal functioning of these systems.