Urology is the field of medicine that focuses on diseases of the urinary tract (in both men and women) and the male reproductive tract. In some cases, they may perform surgery. For example, they may remove cancer or open up a blockage in the urinary tract.

The urinary tract is the system that creates, stores, and removes urine from the body. Urologists can treat any part of this system. This includes the:

• kidneys, which are the organs that filter waste out of the blood to produce urine
• ureters, which are the tubes through which urine flows from the kidneys to the bladder
• bladder, which is the hollow sac that stores urine
• urethra, which is the tube through which urine travels from the bladder out of the body
• adrenal glands, which are the glands located on top of each kidney that release hormones

Urologists also treat all parts of the male reproductive system. This system is made up of the:

• penis, which is the organ that releases urine and carries sperm out of the body
• prostate, which is the gland underneath the bladder that adds fluid to sperm to produce semen
• testicles, which are the two oval organs inside the scrotum that make the hormone testosterone and produce sperm

Source: www.healthline.com