The kidneys are the root of the innate nature. Chinese medicine believes that the kidneys store essence and are the mainstay of growth and development, which shows how important the kidneys are to the human body! The human body has two kidneys, one on each side of the retroperitoneal crest at the waist. Although there are two kidneys, but can not lose one of them, only the two sides of the kidney function properly, can really maintain the health of the body. Life is more bitter and difficult, you can not play the idea of kidney, can not move to sell kidney, do not know the importance of the kidney to the human body. The main functions of the kidney for the human body are: a. Generate urine, excretion of metabolites. The body produces a variety of waste in the process of metabolism, the vast majority of waste through the glomerular blood filtration, renal tubular secretion, with urine out of the body. Second, to maintain the balance of body fluids and acid-base balance in the body. Through glomerular filtration, renal tubular reabsorption and secretion, the kidney excretes excess water, regulates acid-base balance and maintains the stability of the internal environment. Third, the degradation and inactivation of hormones, the kidney is also the site of degradation and inactivation of many hormones, such as insulin, parathyroid hormone, glucagon, calcitonin and many other hormones, are degraded in the proximal tubular cells of the kidney. When renal insufficiency occurs, the biological half-life of these hormones is significantly prolonged, leading to accumulation in the body and can cause metabolic disorders. Fourth, secrete vasoactive substances, secrete renin, angiotensin, prostaglandin, etc., which play an important role in the regulation of blood pressure. Fifth, the generation of active vitamin D, the conversion of 25(OH)2 vitamin D3 to 1,25(OH)2 vitamin D3, regulation of calcium and phosphorus metabolism in the body, maintaining the normal structure and function of bones, but also involved in the regulation of immune function. Insufficient active vitamin D is caused by renal insufficiency. VI. Secretion of erythropoietin (EPO), which promotes bone marrow hematopoiesis and the production of red blood cells. In renal insufficiency, the synthesis of erythropoietin is reduced, which causes anemia. This shows how important the kidneys are to human health, and it is our duty to protect them.