Human urinary system, anterior view, anatomy. The human urinary system seen anterior with the right kidney seen in section to mount the fibrous capsule which envelops the cortex of the kidney. The pyramids abut in the pelvis which is extended by the ureter which opens at the bottom of the bladder at the level of the ostium of the ureter. Between the osmium, the bladder trigone. Directly under the bladder, the prostate passes through the urethra with the mouth of the seminal vesicles at the level of the veru montanum.