The sphincter mechanism of the urinary bladder and the urethra.
D006801:Humans; D008297:Male; D009132:Muscles; D014521:Urethra / Q000502:physiology*; D001743:Urinary Bladder / Q000502:physiology*; D014553:Urinary Tract Physiological Phenomena
BLADDER/physiology; URETHRA/physiology