Vagina 陰道 (Part 1 第1部分)

The vagina (vagina from Latin, literally "sheath" or "scabbard") is a fibromuscular tubular Unit Leader of the uterus outside the body in female placental mammals and marsupials, or the cloaca in female birds, monotremes, and some reptiles. Female insects and other invertebrates, a vagina, which is the extremity of the fallopian tube. The Latin plural (in English is rarely used) vagina.

The word vagina is sometimes used to refer to the vulva or female genitals generally, strictly speaking, the vagina is a specific internal structure.

Human Anatomy

The human vagina is an elastic muscular canal that extends from the cervix to the vulva. Although there is wide anatomical variation, the length of unaroused vagina, about 6 to 7.5 cm (2.5 to 3 inches) in the anterior (front) and 9 cm (3.5 inches) long in the posterior wall (rear ). During sexual arousal the vagina expands in length and width. Its elasticity allows it to stretch during sexual intercourse and during birth to offspring. The vagina connects the superficial vulva, cervix deep.

Once we have a woman who has a vaginal tube top rear and forming an angle of just over 45 degrees with the uterus. The vaginal opening is the end of the vulva, urethra, behind the opening. The upper quarter of the vagina is separated from the rectum of a donkey. Above the vagina is Mons Veneris. The vagina and the vulva, is reddish pink color, like most healthy internal mucous membranes in mammals. A series of ridges by folding the wall of the vagina Palati outer third of the vagina of the woman is called produced. You are transverse ridges and epithelial function is to enter the vagina with an increased surface area and distances. Vaginal lubrication is provided by the Bartholin's glands near the entrance of the vagina and cervix are available. The membrane of the vaginal wall also produces moisture, although it contains no glands. Before and during ovulation, mucus glands secretes different variations of mucus in the throat, which is offering favorable alkaline environment in the vaginal canal to maximize the chances of survival of sperm.

The hymen is just a thin membrane of connective tissue at the opening of the vagina. As with many females, the hymen covers the opening of the vagina from birth until it is not torn during sexual intercourse or sexual activity. The tissue can through the vagina, pelvic examination, injury, or to break certain kinds of activities like horseback riding or gymnastics. Indicate the absence of a hymen does not necessarily before sexual activity, since it does not always broken during sex. Similarly, the presence has not necessarily prior to a lack of sexual activity, because it is possible for a small company without breaking, or it can be surgically restored.


陰道（來自拉丁美洲陰道，意思是“套”或“刀鞘”）是一家領先的纖維肌性管狀道從子宮到外部身體女性胎盤哺乳動物和有袋動物，或泄殖腔在母鳥，單孔類，以及一些爬行動物。女性昆蟲和其他無脊椎動物也有陰道，這是終端部分輸卵管。複數的拉丁（很少使用英語），陰道。

陰道這個詞有時被用來指女性生殖器外陰或一般，嚴格來說，陰道是一個特定的內部結構。


人體解剖學

人類陰道是一個彈性的肌肉運河延伸至從子宮頸外陰。雖然有廣泛的解剖變化，長度的unaroused陰道約6至7.5厘米（2.5至3時）在整個 前壁（前），和9厘米（3.5英寸）長的整個後壁（後）。在性興奮的陰道擴大在長度和寬度。它的彈性使其能夠在拉伸性交和生育期間的後代。陰道表面外陰連 接到子宮頸深子宮。

如果婦女挺立，陰道管點向上，落後的方向和形式的角度略超過45度的子宮。陰道開口在尾端的外陰，背後的開放尿道。上層四分之一的陰道分離直腸的 rectouterine袋。陰道上方是陰阜。陰道，隨著內部的外陰，是粉紅的顏色，與大多數健康的內部粘膜的哺乳動物。 A系列產品的山脊折的壁外的第三個女性陰道被稱為陰道皺褶。他們是橫向上皮山脊和它們的功能是提供陰道的面積增加了擴展和延伸。陰道潤滑是提供巴氏腺附近 的陰道口和子宮頸。該膜的陰道壁也產生水分，雖然它不包含任何腺體。排卵之前和期間，子宮頸的粘液腺分泌的粘液不同的版本，它提供了一個良好的鹼性環境， 陰道運河最大限度地生存的機會的精子。

處女膜是薄膜結締組織是位於開放陰道。與許多雌性動物，處女膜包括開放陰道從出生直至破裂性或在非性行為。該組織可以通過插入陰道破裂，盆腔檢 查，受傷，或某些類型的活動，如騎馬或體操。若沒有處女膜不一定表明事先性活動，因為它並不總是在性交破裂。同樣，存在並不一定表明事先缺乏性活動，因為 它有可能是輕微的活動不破裂，或使它成為外科手術恢復。