Vagina:The肌肉发达的canal that extends from thecervixto the outside of the body. It is usually 6 to 7 inchesinlength, and its walls are lined withmucous膜. It includes two vaultlike structures: theanterior(front)vaginal fornixand theposterior(rear) vaginalfornix. The cervix protrudes slightly into thevagina, and through a tiny hole in the cervix (theos),spermmake their way toward the internal reproductive organs. The vagina also includes numerous tiny glands that make vaginal secretions.
