1. Lungs: Some land snails, such as garden snails, possess lungs that function like our own, extracting oxygen from the air.
2. Gills: Aquatic snails, such as sea snails, have gills responsible for oxygen exchange in water.
3. Skin Respiration: Certain species, like pond snails, utilize the skin's network of blood vessels to absorb dissolved oxygen from water directly through the skin.
4. Mantle Cavity: Many snails, both terrestrial and aquatic, consist of a mantle cavity, a space between the body and the shell. This cavity contains various respiratory structures depending on the species, including the opening for lung or the location of gills.
The respiratory system of snails is adapted based on their environment, enabling them to successfully obtain oxygen, whether in terrestrial or aquatic settings.