molluscs Flashcards
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molluscs are protostomia and diploblastic, scizocholeomate
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2
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what are innovations of the molluscs?
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they have a head foot portion and a visceral mass portion. they evolved a radula. and most importantly they have a mantle, which can produce a protective shell.
3
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the head foot portion contain the feeding, cephalic sensory and locomotor organs
4
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the visceral mass has digestive, ciculatory, reproductive organs
5
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the mantle consists of outer mantle epithelium that secreets a shell,
the shell consist of 3 layers, nacreous layer, prismatic layer, on top you have the periostracum
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