How Ureters Enter the Bladder?

The ureters begin at the ureteropelvic junction (UPJ) of the kidneys, which lie posteriorly to the renal vein and artery in the hilum[1]. The ureters then travel inferiorly inside the abdominal cavity. They pass over (anterior to) the psoas muscle and enter the bladder on the posterior bladder aspect in the trigone.

Why do ureters enter bladder obliquely?

2 Ureter. The ureters extend from the hili of the kidneys caudally along the ventral surface of the sub-lumbar muscles to the dorsolateral surface of the bladder. They pass obliquely through the bladder muscularis, which forms a valve to prevent reflux of urine from the bladder.

How many ureters enter the urinary bladder?

The two ureters enter the bladder at ureteric orifices, and the urethra enters at the trigone of the bladder.