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Fluid leaving the kidneys passes on through the ureters and empties into the bladder. Once full, the bladder empties via the urethra.

Bladder: Situated in a central position inside the front of the lower abdomen, the bladder collects the urine produced by the kidneys, becomes distended and releases it during urination. This is partly a voluntary act.

Ureter: Tubes leading from the kidney, the ureters collect urine and empty into the bladder.

Urethra: A tube leaving the bladder, it is from the urethra that urine finally leaves the body. In males, the urethra is also where semen passes before leaving the penis after ejaculation.