Vagina anatomy during sex

By Sabine Walter, Pierre A. What makes women different from men is that much of our sexual apparatus is on the inside — most notably, the vagina. The vagina itself is a hollow, muscular tube that extends from the external opening at the vestibule all the way to the cervix. The walls of the vagina have several layers: the mucosa, which secretes various fluids; a muscular layer; and connective tissue. Beneath the vagina, on the pelvic floor, are other muscles that are responsible for keeping the vagina elevated, tight, and firm. During intercourse, the vagina stretches to accommodate the penis.
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Vaginas 101

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Vagina: Definition, Anatomy, Function, Diagram, and Conditions

In mammals , the vagina is the elastic, muscular part of the female genital tract. In humans, it extends from the vulva to the cervix. The outer vaginal opening is normally partly covered by a membrane called the hymen. At the deep end, the cervix neck of the uterus bulges into the vagina. The vagina allows for sexual intercourse and birth. It also channels menstrual flow menses , which 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.
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How Vaginas Work

The vulva includes the:. The vagina is a muscular canal lined with nerves and mucus membranes. It connects the uterus and cervix to the outside of the body, allowing for menstruation, intercourse, and childbirth. The vaginal opening, also called the vaginal vestibule or introitus , is the opening into the vagina. The opening is where menstrual blood leaves the body.
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In a non-aroused state, the walls of the vagina are collapsed against each other. The vagina changes: during sex, throughout the menstrual cycle, and with age and different life stages. People often use the term vagina to refer to the entire female genital region between the legs—but this is incorrect. The vulva is the correct name for the external parts of the female genitalia. This includes the glans clitoris , labia minora and majora, opening of the urethra and vagina the introitus , and the surrounding tissue.
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