What are kidney functions?

Kidney is an important excretory and endocrine organ of human body. Its function is mainly to excrete metabolites in the body. Through excretion function, it can remove toxic and harmful substances from urine, while retaining important nutrients for human body, thus maintaining stable water, electrolyte and acid-base balance of human body. In addition, kidney is also an endocrine organ, which can secrete renin and prostaglandin to regulate blood pressure stability. Through the secretion of erythropoietin, to stimulate bone marrow hematopoiesis, correct the body's anemia state. Kidney also has a hydroxylase, vitamin D can be converted into the most active 1,25-dihydroxy vitamin D3, so it can play a role in promoting calcium absorption and regulating calcium metabolism.