The vagina is the passage that connects a girls uterus to the outside of her body

The vagina is the passage that connects a girls reproductive system (uterus) to the outside of her body.  The vagina is where your monthly menstrual fluid leaves your body, as well as where a baby leaves the mothers body at the end of pregnancy. It is also where the penis enters the female body during sex and where you'd place a tampon during your period.