Slugs live on land and in saltwater, and one genus, Acochlidium, lives in freshwater. The unadorned word slug, however, is applied primarily to land slugs, whereas slugs from the sea or from fresh water are usually referred to as  sea slugs  or freshwater slugs.f the six orders of Pulmonata, two â the Onchidiacea and Soleolifera â solely comprise slugs. A third family, the Sigmurethra, contains various clades of snails, semi-slugs (i.e. snails whose shells are too small for them to retract fully into) and slugs.
Vulva is the external parts of the female genitalia. The external opening to a woman's vagina or reproductive track is an example of the vulva. vulva. pl. vulva.
In mammals, the vagina is a muscular and tubular part of the female genital tract, which, in humans, extends from the vulva to the cervix. 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.