Phylum Mollusca - Mollusks - includes snails, slugs, clams, scallops ...

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Three classes of AnnelidsClass Polychaeta - marine worms - fan worms, feather worms,tube worms, bristleworms, sandworms, etc.Class Oligochaeta - earthworms - both terrestrial and freshwaterClass Hirudinea - leeches - mostly freshwater, some terrestrial andmarine
Class Polychaeta - Polychaetes -“many bristles” - marine wormsHave well developed heads withspecialized sensory and feeding structuresHave paddle-like parapodia - forlocomotion and aid in gasexchange - with many bristlescalled “setae”Separate sexes with externalfertilization -Have trochophore larva - likesome mollusksAn important link in marine foodchains - many live in associationwith sponges, mollusks,echinoderms, crustaceans
Page 3 and 4: Mollusk body plan: head-foot, visce
Page 5 and 6: All mollusks except Bivalves posses
Page 7 and 8: ReproductionMost have separate sexe
Page 9 and 10: Class Gastropoda - Snails and Slugs
Page 11 and 12: Class Bivalvia - BivalvesIncludes c
Page 13 and 14: Class Cephalopoda - Octopus, Squid
Page 15 and 16: Phylum Annelida - Annelids - Segmen
Page 17: Segments are specialized for specif
Page 21: Class Hirudinea - LeechesMost are f

Phylum Mollusca - Mollusks - includes snails, slugs, clams, scallops ...

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