Urinary system (overview)

The urinary system is composed of the following organs:

Note: In this 3D article, you can study the specific anatomical characteristics of the female and male bladder, as well as the female and male urethra.

The urinary system is one of the essential organ systems, as it provides such functions as:

  • Filtering blood and creating urine;
  • Disposing the body from waste products, which emerge as a result of cell metabolism;
  • Participating in the regulation of blood volume and blood pressure;
  • Controlling fluid and electrolyte balance;
  • Regulating blood pH levels;
  • Producing hormones and regulating red blood cell production.

The kidneys are the main organs that filter excess fluid, electrolytes, and metabolites, while the other organs of the urinary system accumulate or excrete urine from the body. 

The ureters transport urine from the kidneys to the urinary bladder, where it is stored and then discharged from the body via the urethra in a process called urination.