It is a muscular conduit which extends from the urinary bladder to the outside, for expelling urine out of the body. It’s length is much smaller in females, while much longer in males. It is surrounded in the region of the sphincter by a muscle, which controls when does the subject pass urine and when does he or she controls urine.
The urethra can be affected by strictures (narrowing), stones, malignancy (cancer), infection or congenital defects ( defects present since birth).