This document provides an overview of several key concepts related to the urinary system. It defines extracorporeal shockwave lithotripsy (ESWL) as a non-invasive procedure that uses ultrasound waves to break up stones in the urinary tract. It also explains that a KUB X-ray images the kidneys, ureters and bladder without contrast dye. Additionally, it states that the genitourinary system includes both the urinary system organs and the sexual organs. Catheterization is outlined as inserting a tube through the urethra into the bladder to drain or insert dye. Finally, it describes a urinary tract infection as a bacterial infection that usually starts in the bladder and can ascend