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Related Flashcards
Cards In This Set
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What term means that an animal has a true body cavity; it is hollow, fluid filled cavity in which the organs are suspended? |
True coelom
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What term means that an animal has a "false" body cavity; it is only partially lined with mesoderm tissue?
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Pseudocoelom
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What term means that an animal has no body cavity?
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Acoelmates
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Name given to the free-swimming, ciliated larva found in the phylum Mollusca? |
Trochophora larva
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Other than the phylum Mollusca, what other phylum has the type of larva described in question 4?
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Annelids
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What type of body symmetry do the mollusks possess?
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Bilateral
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List the three body regions composing the mollusk body plan.
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Head, Foot, and Viseral Mass |
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Name the tissue layer that covers the internal organs and is responsible for secreting the shell.
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Mantle
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What structure found in aquatic mollusks has a large surface area for the diffusion of gases into and out of the body?
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Gills
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What is the name given to the flexible, tounge like stucture wih abrasive teeth that s used for feeding?
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Radula |
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What class of mollusk contains snails, slugs, and nudibranchs? |
Gastropods
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What phylum of inverterbrates has no body cavity?
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Palatyhelmithes
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What phylum of inverterbrates has a false coelom?
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Nematoda |
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Name three phyla of organisms possessing a true coelom.
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Mollusca, Annelids, Arthopoda
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What class of mollusks contains clams, oysters, and mussels?
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Bivalvia
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