When the bladder is full and receives the signal to empty, the muscles in the bladder contract. This causes two valves (sphincters) to open and release a flow of urine. The urine goes into the tube-like urethra, which carries it out of the body. This trip is a bit longer in men than in women: in men, this waste must travel the length of the penis.
This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.