Vagina

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The vagina is the elastic, muscular part of the female genital tract. 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.

The vagina receives the penis during sexual intercourse. To accommodate smoother penetration of the vagina during sexual intercourse or other sexual activity, vaginal moisture increases during sexual arousal in human females. This increase in moisture provides vaginal lubrication, which reduces friction. The texture of the vaginal walls creates friction for the peni] during sexual intercourse and stimulates it toward ejaculation, enabling fertilization.

Function of the male foreskin

Warren & Bigelow (1994) reported the foreskin "provides slack skin on the shaft of the erect penis allowing it to glide within its own sheath of skin during intercourse. This provides for more enjoyable intercourse for both partners and avoids problems with vaginal dryness."

See also

• The Female Reproductive System