part_of starts_at ends_at nephric duct male reproductive system nephric duct of male Wolffian duct of male mesonephric duct of male EMAPA:35591 The nephric duct of male (nd) (syn: mesonephric duct of male, Wolffian duct of male) (TS:20-TS:23). Paired epithelial ducts which develop early in development in the cranial/anterior intermediate mesoderm and extend caudally down the rostro-caudal axis of the embryo to terminate at the urogenital sinus/pelvic urethra. Part of the reproductive system from TS:20. Develops from the nephric duct (TS:19), and is located in mesonephros (anterior) and then at its caudal end (posterior), connects to the dorsal, anterior urogenital sinus (caudal urogenital sinus) at the urogenital sinus ridge. Marked by Cdh1, Pax2 (also seen in the paramesonephric duct) and Hoxb7 (specific to the nephric duct). From TS:20-TS:23, is comprised of epithelium of nephric duct of male and mesenchyme of nephric duct of male (the mesenchyme surrounding the epithelial duct). In males, the nephric duct of male becomes seminal vesicle, ductus deferens and epididymis from TS:24. anatomical_structure TS20 TS23