THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Urethra. This tube allows urine to pass outside the body. The brain signals the bladder muscles to tighten, which squeezes urine out of the bladder. At the same time, the brain signals the sphincter muscles to relax to let urine exit the bladder through the urethra.

Detailed explanation-2: -The opening to the outside is the external urethral orifice. The mucosal lining of the urethra is transitional epithelium. The wall also contains smooth muscle fibers and is supported by connective tissue. The internal urethral sphincter surrounds the beginning of the urethra, where it leaves the urinary bladder.

Detailed explanation-3: -And since the urethra is the tube through which urine passes from the bladder to the outside of the body, it can make peeing very uncomfortable-sometimes even excruciating. This article explains the causes, diagnosis, complications, and treatment of urethral pain.