Lower 1/3 of vagina is formed by: (A) Mesonephric duct, (B) Paramesonephric duct, (C) Sinovaginal bulb, (D) Mesoderm of mullerian duct
Answer is C. Lower 2/3rd of vagina formed from sinovaginal bulb which comes from endoderm of urogenital sinus. Upper 1/3rd of vagina is derived from fused paramesonephric duct. Mesonephric duct forms the collecting pa or ductular pa of male reproductive system. Mesoderm of Mullerian duct is basically paramesonephric duct.