About ureter true is

Abdominal ureter. The ureter is roughly 25-30 cm long in adults and courses down the retroperitoneum in an S curve. At the proximal end of the ureter is the renal pelvis; at the distal end is the bladder. The ureter begins at the level of the renal aery and vein posterior to these structures . Ref - BDC 6e vol2 pg 318