The urinary system, also known as the renal system, produces, store and eliminates urine, the fluid waste excreted by the kidneys. The kidneys make urine by filtering waste and excrete water from blood. Urine travels from kidneys through two thin tubes called ureters and fills the bladder. When the bladder is full, a person urinates through the urethra to eliminate the waste.
The urinary system is susceptible to a variety of infections and other problems, including blockages and injuries. These can be treated by a urologist or another health care professional who specializes in the renal system.