Best Alternative Treatment to Avoid Kidney Transplant Introduction Kidneys are one among the vital organs in the body without which life can’t be sustained. Kidney the major organ in the body that lies in the retroperitoneal space and is of bean shape has the prime function to excrete waste products from the body. The functional unit of the kidney is a nephron which does filtration, reabsorption, secretion and excretion, the end resultant of this process is urine which includes wastes