• There are three fetal kidneys, the pronephros, the mesonephros and the metanephros.
• The metanephros forms the final adult kidney.
• The metanephros forms in the pelvis and migrates upwards.
• The ureteric bud form the draining system from the collecting ducts to the bladder.
• Metanephric tissue forms the tubular system from the glomeruli to the distal nephron.
• Capillaries invaginate tubules to form glomeruli
• The urogenital sinus forms most of the bladder The urethral folds form the external genitalia

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C. A. O'Callaghan 2004