The urinary system is one of the eight systems involved in the functioning of the human body. The urinary system consists of two kidneys, two ureters, a bladder and urethra, and in men, there is also the prostate gland, which is also part of the urinary tract. This is normal, and in some populations, there can be congenital abnormalities of the urinary system, such as duplicated kidneys, duplicated ureters, or isolated kidneys. To return to the role of the urinary tract, it is an important excretion pathway for human metabolites, and also regulates water and salt metabolism and acid-base balance, and produces a variety of biologically active substances that play an important role in maintaining the stability of the body’s internal environment. In layman’s terms, metabolic wastes from various parts of the body are transported through the blood to the kidneys, where they are filtered through the blood to form urine. The kidneys are the site of urine production, while the ureters, bladder, and urethra are the channels for urine discharge, respectively. Sometimes we compare the urinary system to the “sewer” of the human body, which is still quite graphic. The urinary system is also closely related to other systems, for example, it is closely related to the circulatory system and the respiratory system because it is involved in the regulation of water-electrolyte and acid-base balance. In addition, there is a connection between them because of their “proximity” to the reproductive system.