<prompt> Secretory part of kidney originates from -MetanephrosUreteric budMesonephrosParamesonephric duct  <response>: Ans. is a i.e., Metanephros Kidneys develop from two sources :i Metanephros metanephric mesoderm or blastema: It is the lowest part of nephrogenic cord which is derived from intermediate mesoderm. It forms the excretory unit of kidney i.e. glomeruls, proximal convoluted tubule, loop ofhenle and distal convoluted tubule.ii Ureteric bud: It arises from lower part of mesonephric duct. It forms collecting part of kidney pelvis, major calyes, minor calyces, collecting tubules and ureter. 