BIO 1305 Lecture Notes - Lecture 10: Gastrovascular Cavity, Gastrointestinal Tract, Rotifer
16 Dec 2017
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Fill out the terms and expand upon them. (giving examples, diagrams, explaining, etc. when applicable. : complete the table with descriptions of each phylum of the lophotrochozoans. (pg710) Platyhelminthes (flatworms) hermaphroditic, acoelomate, triploblastic, gastrovascular cavity with one opening (anus and mouth is the same) Rotifera (rotifers) pseudocoelom, full digestive system, separate mouth and anus, reproduce by parthenogenesis. Brachiopoda coelomates with lophophores (feeding structures bearing ciliated tentacles) Mollusca (clams, snails, squids) coelomated, internal/external shell, radula (chitin), mantle, food/tentacles. Earthworms: clitellum body part, hermaphroditic, coelomate, setae, true organ system. The more surface area, the more resource absorption. Folding, branching, projections are all ways organisms maximize surface area: rotifers have an alimentary canal which is a digestive tube with two openings, what does the meaning of the word rotifer confer about the anatomy of the phylum. Soft bodied, but most are protected by a shell. They feed using a rasplike radula that can scrape their food: list the major classes and examples of mollusks.
