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What is The upper 1/3rd of vagina develops from and explain in detail?
Upper 1/3rd of vagina develops from uterovaginal canal(mesoderm) which is the union of lower veical pa of paramesonephric or mullerian duct. Lower 2/3rd 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 .