Vagina
The vagina is an elastic, muscular canal that connects the uterus to the outside world. The Vagina’s entrance is formed by the vulva and the labia. During sex, the vagina receives the penis and provides lubrication and sensation. During menstruation blood flows through the vagina from the uterus, and during childbirth the vagina acts as a birth canal. (http://www.webmd.com/women/picture-of-the-vagina)
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