Simple illustration of urinary system. Kidney and ureter are shown in cross-section to reveal calculi causing obstructions at various sites.

Interior of male urinary bladder and prostatic urethra, anterior view.

Female ureter in pelvis, anterosuperior view.

A. Male pelvis, anterosuperior view.

Autonomic nerves of female pelvis. B. Median section, subperitoneal tissue removed.

Seminal vesicles and prostate. B. Bladder, deferent, ducts, seminal vesicles, and prostate, posterior view. The left seminal vesicle and ampulla of the deferent duct are dissected free and sliced open; part of the prostate is cut away to expose the ejacul

Image illustrating vesiculoureter reflex; cross-section of full bladder with a back flow of urine toward kidney due to a congenital defect, obstruction of the bladder outlet, or infection of urinary tract; with this condition the opening of the affected

Anterior view of the urinary system (kidney, ureters, and bladder). Boney structures are also shown as landmarks.

(Top) Normal bladder and voiding pattern. (Bottom) Bladder refluxing into ureters with voiding.

Bladder, prostate, deep perineal space, and proximal portion of male urethra on frontal section and in left lateral view. The probe is located at the left ureteric orifice.

Two simple images showing examples of duplicate, or bifid, ureters. Left image shows an example of incomplete bifid ureters, the right image is an example of complete bifid. These can be unilateral or bilateral.

Ureter, bladder surgery