A glandular organ which excretes urea and other waste products from the animal body; a urinary gland.

One of two organs in the lower back that filter blood and make urine

The body organ that makes urine. Kidney cancer is a disease that starts in the cells of the kidney. There are different types - the most common is renal cell carcinoma RCC). See kidney cancer section.

The organ of blood filtration in humans. The functional unit of the kidney is the nephron.