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2. Mollusc shell - Wikipedia

   en.wikipedia.org/wiki/Mollusc_shell

   The mollusc (or mollusk [spelling 1]) shell is typically a calcareous exoskeleton which encloses, supports and protects the soft parts of an animal in the phylum Mollusca, which includes snails, clams, tusk shells, and several other classes. Not all shelled molluscs live in the sea; many live on the land and in freshwater.

3. Valve (mollusc) - Wikipedia

   en.wikipedia.org/wiki/Valve_(mollusc)

   Bivalve molluscs (e.g. clams and oysters) have a shell which is composed of two separate but articulating parts. Each one of these two parts is known as a "valve". The two valves are known as the "right valve" and the "left valve"; these are labeled with respect to the anterior end of the bivalve, when the umbones are facing upward.

4. Gastropod shell - Wikipedia

   en.wikipedia.org/wiki/Gastropod_shell

   The gastropod shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton , which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage.

5. Digestive system of gastropods - Wikipedia

   en.wikipedia.org/wiki/Digestive_system_of_gastropods

   The highly modified parasitic genus Enteroxenos has no digestive tract at all, and simply absorbs the blood of its host through the body wall. [1] The digestive system usually has the following parts: buccal mass (including the mouth, pharynx, and retractor muscles of the pharynx) and salivary glands with salivary ducts; oesophagus and ...

6. Siphon (mollusc) - Wikipedia

   en.wikipedia.org/wiki/Siphon_(mollusc)

   The internal anatomy is visible, including the paired siphons to the right. A siphon is an anatomical structure which is part of the body of aquatic molluscs in three classes: Gastropoda, Bivalvia and Cephalopoda (members of these classes include saltwater and freshwater snails, clams, octopus, squid and relatives).

7. Mantle (mollusc) - Wikipedia

   en.wikipedia.org/wiki/Mantle_(mollusc)

   In some mollusks the mantle cavity is a brood chamber, and in cephalopods and some bivalves such as scallops, it is a locomotory organ. The mantle is highly muscular. In cephalopods the contraction of the mantle is used to force water through a tubular siphon, the hyponome , and this propels the animal very rapidly through the water.