The urinary apparatus is an important part of the human body that helps in eliminating waste and excess fluids. This functional system is also referred to as the urinary system or the excretory system. Other synonyms for the urinary apparatus include the renal system, urogenital system, urinary tract, and genitourinary system. The renal system comprises two kidneys, the ureters, the bladder, and the urethra. Similarly, the urogenital system includes the urinary organs and the genital organs, as both systems are interconnected. The urinary tract includes the kidneys, ureters, bladder, and urethra, while the genitourinary tract entails the kidneys, urinary tract, and the reproductive organs.