DEVELOPMENT OF VAGINA
1--upper 1/3 : (mesodermal) develops from paramesonephric ducts (utero-
vaginal primordium) which project into urogenital sinus as Mullarian tubercle.
2--lower 2/3 : develop from endoderm of urogenital sinus overlying Mullarian
tubercle, which proliferates to form 2 masses (sinovaginal bulbs) which fuse
together to form a solid vaginal plate.
*** its central cells break down, forming lumen of vagina.
***its peripheral cells form epithelial lining of vagina.
3--Fibromuscular coat of vagina: develops from surrounding mesoderm.
4--Vestibule of vagina: develops from urogenital sinus.
5--Hymen: lumen of vagina remains separated from that of urogenital sinus by a
thin tissue plate ( hymen) . It usually develops a small opening during perinatal life
1--upper 1/3 : (mesodermal) develops from paramesonephric ducts (utero-
vaginal primordium) which project into urogenital sinus as Mullarian tubercle.
2--lower 2/3 : develop from endoderm of urogenital sinus overlying Mullarian
tubercle, which proliferates to form 2 masses (sinovaginal bulbs) which fuse
together to form a solid vaginal plate.
*** its central cells break down, forming lumen of vagina.
***its peripheral cells form epithelial lining of vagina.
3--Fibromuscular coat of vagina: develops from surrounding mesoderm.
4--Vestibule of vagina: develops from urogenital sinus.
5--Hymen: lumen of vagina remains separated from that of urogenital sinus by a
thin tissue plate ( hymen) . It usually develops a small opening during perinatal life
