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  2. Mollusca - Wikipedia

    en.wikipedia.org/wiki/Mollusca

    The four most universal features defining modern molluscs are a soft body composed almost entirely of muscle, a mantle with a significant cavity used for breathing and excretion, the presence of a radula (except for bivalves), and the structure of the nervous system. Other than these common elements, molluscs express great morphological ...

  3. Category:Mollusc anatomy - Wikipedia

    en.wikipedia.org/wiki/Category:Mollusc_anatomy

    Pages in category "Mollusc anatomy" The following 35 pages are in this category, out of 35 total. This list may not reflect recent changes. A. Aesthete (chiton)

  4. 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.

  5. Mantle (mollusc) - Wikipedia

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

    This space contains the mollusk's gills, anus, osphradium, nephridiopores, and gonopores. The mantle cavity functions as a respiratory chamber in most mollusks. In bivalves it is usually part of the feeding structure. In some mollusks the mantle cavity is a brood chamber, and in cephalopods and some bivalves such as scallops, it is a locomotory ...

  6. 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.

  7. 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).

  8. 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 ...

  9. Decapod anatomy - Wikipedia

    en.wikipedia.org/wiki/Decapod_anatomy

    The decapod (crustaceans such as a crab, lobster, shrimp or prawn) is made up of 20 body segments grouped into two main body parts: the cephalothorax and the pleon . [1] [2] Each segment may possess one pair of appendages, although in various groups these may be reduced or missing. They are, from head to tail:

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