摘要: The most obvious function of the kidney is excretion xenobiotics, excessive electrolytes and trace elements, unnecessary and/or harmless metabolic products such as uric acid, urea ammonia. Through its excretory function, plays a pivotal role in regulation volume ion composition body fluids. For instance, it participates K+, Na+, CI–, HCO–, Ca2+, Mg2+ HPO2.– content thus influences intracellular fluid, extra cellular blood pressure, acid–base balance, mineral metabolism, etc. Accordingly, target various hormones. Furthermore, releases or activates hormones itself, erythropoietin, calcitriol [1,25–(OH)2D3], angiotensin, prostaglandins kinins. also carries out several important functions, gluconeogenesis, degradation fatty acids inactivation