Urogenital system of the 30-mm embryo.
Keywords: allantois, anus, female duct, glans penis, gonad, kidney (metanephros), mesonephric duct, mesonephros, phallus (penis), rectum, suprarenal gland, urachus, ureter, urethra, urethral groove, urinary bladder, urogenital sinus (phallic part)
Source: Atlas of Human Embryos.