This is a science diagram about kidney. A scientific diagram is a visual that depicts how an experiment was set up. They are done in two dimensions and are not meant to seem like actual drawings. They must be very clear, exact, and simple to grasp. A kidney is the functional unit of the renal system and is present in the cavity of the lower abdomen. It works to remove the excess water and impurities of blood from the body as urine. The primary functions of the kidney are balancing the acid-based in blood, managing the electrolytes, and regulating blood pressure by keeping the water and salt balance.