CBSE Class 10 Answered

Essentially, all snails, to some degree, breathe through their skin and the gills which are situated in the palatial cavity. Yet, in terrestrial as well as some freshwater snails, the gills have been reduced and instead have a collection of capillary blood vessels on the rear end of their palatial cavity which allows oxygen to enter and represent a simple lung. Most land snails have a mantle cavity within which there is a lung. They breathe in and out through the pneumostome or the breathing pore.