<prompt> The upper 13rd of vagina develops fromMullerian ductsWolffian ductsSinovaginal bulbsEndoderm  <response>: Upper 13rd of vagina develops from uterovaginal canalmesoderm which is the union of lower veical pa of paramesonephric or mullerian duct. Lower 23rd of vagina develops from paramesonephric or mullerian tubercle arises from endoderrm of definitive urogenital sinus which gives two solid evagenations. The 2 solid evagenations growup and form sinovaginal bulb and then the 2 sinovaginal bulbs fuse together forming a thick cellular plate called the vaginal plate . 