Common names of well known parts of the human body, from top to bottom. The vagina is an elastic, muscular canal with a soft, flexible lining that provides lubrication and sensation. The vagina connects the uterus to the outside world. The vulva and labia form the entrance, and the cervix of the uterus protrudes into the vagina, forming the interior end. The vagina. What's the purpose, you might ask, of a website full of pictures of the female body, in particular pictures of the clitoris, labia, vulva, and vagina?