Major structures of the vulva include the labia major and minora, mons pubis, clitoris, bulb of vestibule, vulva vestibule, vestibular glands, and the genital orifice (or opening of the vagina ). The ...Major structures of the vulva include the labia major and minora, mons pubis, clitoris, bulb of vestibule, vulva vestibule, vestibular glands, and the genital orifice (or opening of the vagina ). The mons pubis separates into two folds of skin called the labia majora, literally “major (or large) lips.” The cleft between the labia majora is called the pudendal cleft, or cleft of Venus, and it contains and protects the other, more delicate structures of the vulva.