"Vesicoperitoneal" Natural Recordings by Native Speakers
"A fluid-filled sac, vesico-, nearly a bladder; situated around, peri-, the peritoneum of the abdominal cavity"
Vesicoureteral refers to the ureter that runs from the bladder to the kidney that has vesicula, which is a small pouch or a small, sac-like formation, connected or related to it, especially in the context of Urinary tract infections or Vesicoureteral reflux, often through the ureter.