Platyhelminthes_Nematoda

Platyhelminthes_Nematoda - Exercise 36 Animal Kingdom Phyla...

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Exercise 36 Animal Kingdom Phyla Platyhelminthes & Nematoda BIOL 1740
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Today’s Schedule Introduction and background information on Platyhelminthes and Nematoda Complete exercise 36 Answer questions for further thought and study, lab summary, and exercise questions. Review for quiz Quiz
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Exercise 36 Objectives Describe how structures specific to Platyhelminthes and nematodes help them survive in their environment and promote their future evolutionary persistence Describe the general morphology of flatworms in phylum Platyhelminthes and roundworms in phylum Nematoda. List characteristics which phyla Platyhelminthes and Nematoda have in common with phyla Porifera and Cnidaria List characteristics of flatworms and roundworms that are more advanced than those of more primitive phyla (Porifera and Cnidaria). List examples of roundworms and examples of each major class of flatworms.
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Phylum Platyhelminthes “Flatworms”
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Background Information The simplest animal that is bilaterally symmetrical (distinct anterior and posterior ends) and triploblastic (presence of three tissue layers). Lack a body cavity Incomplete digestion – tube within a tube (sac body plan) Acoelomates – mesoderm is solid mass of tissue with no internal body cavity Dorso-ventrally flattened Possess primitive sense organs (eyespots) Capable of asexual regeneration! Solid, unsegmented, with
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Platyhelminthes_Nematoda - Exercise 36 Animal Kingdom Phyla...

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