Vagina is a thin-walled muscle channel that connects the uterus to the female genitalia and serves as a channel to receive male sperm during intercourse and acts as a conduit for the fetus during birth. Some vaginal glands that secrete mucus and some relatively acid-focused fluids are spread in the lining of the vagina (its walls). The vaginal opening is surrounded by an external vestibule that opens from the upper part of the urinary canal, which carries the urine from the bladder to the outside (the opening of the urinary canal independent of the opening of the vaginal canal). The two openings are surrounded by semi-spongy tissue known as the lower lip and then the big lip. The inside of the vaginal canal is located from the inside of the cervical opening before the hymen.
