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The Urinary System of Cats

By Scott D. Fitzgerald, DVM, PhD, DACVP, DACPV, Professor, Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University ; Joseph W. Bartges, DVM, PhD, DACVIM, DACVN, Professor of Medicine and Nutrition, The Acree Endowed Chair of Small Animal Research, Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee ; Scott A. Brown, VMD, PhD, DACVIM, Josiah Meigs Distinguished Professor and Head, Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia ; Sherry Lynn Sanderson, BS, DVM, PhD, DACVIM, DACVN, Associate Professor, Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia ; Melissa S. Wallace, DVM, DACVIM, MedVet Medical and Cancer Center for Pets, Worthington, Ohio

Also see professional content regarding the urinary system.

The urinary system or tract includes the kidneys, the ureters (tubes that connect the kidneys to the bladder), the bladder, and the urethra (the tube through which urine exits the body). The urinary system has several important functions. It gets rid of the waste products that are created when food is transformed into energy. It also maintains the correct balance of water and electrolytes (salts) within the body’s cells. Another key function is the production of hormones called erythropoietin and renin, which are important in maintaining healthy blood pressure, producing blood cells, and absorbing salt correctly. Finally, the urinary system processes vitamin D.

The urinary system in male cats

The urinary system in female cats

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