Description: The vagina is a closed, H-shaped, distensible muscular passage approx. 5 x 15cm., (transverse x length) that connects the uterus to the exterior at the introitus. The vaginal vanal is covered by a squamous epithelial, rugated lining that is responsive to estradial. At the vagina apex, the portio of the cervix extends 2-3 cm into the vagina. The circular region surrounding the protruding cervix is called vaginal fornix. Above the pelvic floor, the vagina angles posteriorly, and is more distensible than distally. Postero-superiorly inside the pelvis, the vagina is covered by visceral peritoneum, representing much of the anteror-medial wall of the rectouterine pouch.