In mammalsthe vagina is the elastic, muscular part of the female genital tract. In humans, it extends from tattooed vagina fucked vulva to the cervix.
The outer vaginal opening is normally partly covered by a membrane called the hymen. At the deep end, the cervix vaginas of the uterus bulges into the vagina.
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The vagina allows for sexual intercourse and birth. It also channels menstrual flow menseswhich occurs in humans and closely related primates as part of the monthly menstrual cycle.
Although research on the vagina is especially lacking for different animals, its location, structure and size are documented as varying among species. Female mammals usually have two external openings in the fat, the urethral opening for the urinary tract and the vaginal opening for the genital tract. This is different from male mammals, who usually have a single urethral opening for both urination and reproduction.
The vaginal opening is much larger than the nearby urethral opening, and both are protected by the labia in humans.