Picture of Vagina
The vagina is part of the female reproductive system. It is the canal that is flanked by the vulva and labia on the outside of the body and the cervix of the uterus on the inside. A thin membrane called the hymen covers the opening to the vagina. The tissue may be broken or torn during exercise or sexual activity. Menstrual blood flows from the uterus and through the vagina to leave the body. The vagina interacts with the penis during sexual intercourse. The vagina is the birth canal through which a baby enters the world during childbirth.
Text Reference: National Cancer Institute: "Anatomy of the Female Pelvis"