![]() The lateral walls, especially their middle area, are relatively more rigid. When not sexually aroused, the vagina is a collapsed tube, with the front and back walls placed together. The vaginal and urethral openings are protected by the labia. Near the upper vagina, the cervix protrudes into the vagina on its front surface at approximately a 90 degree angle. The vaginal canal travels upwards and backwards, between the urethra at the front, and the rectum at the back. The urogenital triangle is the front triangle of the perineum and also consists of the urethral opening and associated parts of the external genitalia. The opening of the vagina lies in the urogenital triangle. The human vagina is an elastic, muscular canal that extends from the vulva to the cervix. See also: Vaginal support structures Pelvic anatomy including organs of the female reproductive system Because a better understanding of female genitalia can help combat sexual and psychological harm with regard to female development, researchers endorse correct terminology for the vulva. It may be that the incorrect use of the term vagina is due to not as much thought going into the anatomy of the female genitals as has gone into the study of male genitals, and that this has contributed to an absence of correct vocabulary for the external female genitalia among both the general public and health professionals. Medically, one description of the vagina is that it is the canal between the hymen (or remnants of the hymen) and the cervix, while a legal description is that it begins at the vulva (between the labia). Using the term vagina to mean "vulva" can pose medical or legal confusion for example, a person's interpretation of its location might not match another's interpretation of the location. Although by its dictionary and anatomical definitions, the term vagina refers exclusively to the specific internal structure, it is colloquially used to refer to the vulva or to both the vagina and vulva. The vagina may also be referred to as the birth canal in the context of pregnancy and childbirth. The term vagina is from Latin meaning "sheath" or " scabbard" the plural of vagina is either vaginae, or vaginas. By its dictionary and anatomical definitions, however, vagina refers exclusively to the specific internal structure, and understanding the distinction can improve knowledge of the female genitalia and aid in healthcare communication. In common speech, the word vagina is often used to refer to the vulva or to the female genitals in general. The vagina and vulva have evoked strong reactions in societies throughout history, including negative perceptions and language, cultural taboos, and their use as symbols for female sexuality, spirituality, or regeneration of life. Other health issues may also affect the human vagina. Along with pleasure and bonding, women's sexual behavior with others (which can include heterosexual or lesbian sexual activity) can result in sexually transmitted infections (STIs), the risk of which can be reduced by recommended safe sex practices. The texture of the vaginal walls creates friction for the penis during sexual intercourse and stimulates it toward ejaculation, enabling fertilization. This increase in moisture provides vaginal lubrication, which reduces friction. To accommodate smoother penetration of the vagina during sexual intercourse or other sexual activity, vaginal moisture increases during sexual arousal in human females and other female mammals. In amphibians, birds, reptiles and monotremes, the cloaca is the single external opening for the gastrointestinal, urinary, and reproductive tracts. The vaginal opening is much larger than the nearby urethral opening, and both are protected by the labia in humans. This is different from male mammals, who usually have a single urethral opening for both urination and reproduction. ![]() Female mammals usually have two external openings in the vulva these are the urethral opening for the urinary tract and the vaginal opening for the genital tract. It also channels menstrual flow, which occurs in humans and closely related primates as part of the menstrual cycle.Īlthough research on the vagina is especially lacking for different animals, its location, structure and size are documented as varying among species. The vagina allows for sexual intercourse and birth. At the deep end, the cervix (neck of the uterus) bulges into the vagina. The outer vaginal opening is normally partly covered by a thin layer of mucosal tissue called the hymen. In humans, it extends from the vestibule to the cervix. In mammals, the vagina is the elastic, muscular part of the female genital tract. ![]()
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