The vagina is a sex organ that is part of the female genital tract. It is a muscular and tubular in structure. In humans, the vagina extends from the vulva to the uterus. The outer vaginal opening may be 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 childbirth.It channels menstrual flow, which occurs periodically as part of the menstrual cycle.n its normal state, there is anatomical variation in the length of the vagina of a woman of child-bearing age. The length is approximately 7.5 cm (2.5 to 3 in) across the anterior wall (front), and 9 cm (3.5 in) long across the posterior wall (rear), making the posterior fornix deeper than the anterior.
JScreen, an Emory University program, is a national, non-profit, public health initiative dedicated to preventing genetic diseases & promoting healthy families. JScreen.org.
Widescreen is a 16X9 aspect ratio, the same as most TVs today, computer screens, etc. So if you watch something in widescreen, it fills up the screen. It is called widescreen, because the aspect ratio of video and movies used to be 4X3 (the older square TVs). Anamorphic widescreen is typically 2.35:1 aspect ratio. This is where you get the black bars above and bellow the screen. That size is the standard size for cinema screens, and this is the size movies are filmed with.