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Phylum Molluscs

Including: Snails, slugs, seashells, octopuses, squids, and a number of less familiar groups


* Rasping organ called a radula: present in all groups except bivalves and Aplacophora

* Muscular foot: used for locomotion and other tasks

* A sheath of tissue called the mantle that covers the body and can secrete the shell (if there is one)

* A shell present in most molluscs: some molluscs have completely lost it, e.g., slugs.


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