Animal_diversity_II_Lect_3

Animal_diversity_II_Lect_3 - Animal Diversity II Phylum...

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1 Animal Diversity II Phylum Platyhelminthes Flatworms Acoelomate 3 germ layers No circulatory system Beginning of cephalization Gastrovascular cavity Phylum Platyhelminthes Class Turbellaria (free-living) Regeneration Hermaphroditic Well developed head Ganglia Eyespot Gastrovascular cavity Mouth Planarians
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2 Phylum Platyhelminthes Class Trematoda (all parasitic; flukes) Schistosomiasis (parasitic disease in humans) Complex life-cycles (hosts snail, humans) Phylum Platyhelminthes Class Cestoda (all parasitic; tapeworms) No digestive system Proglottids (staggering reproductive potential) Proglottid Phylum Nematoda “Round Worms” Most free-living; also many parasites Pinworms Roundworms Hookworms Insect parasitic nematodes Complete digestive system Protostomes Pseudocoelom
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3 Phylum Rotifera “Wheel animals” Pseudocoelomates Complete digestive system Protostomes Phylum Mollusca “Soft bodied”
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This note was uploaded on 04/03/2008 for the course GB 102 taught by Professor Trans during the Spring '08 term at Rutgers.

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Animal_diversity_II_Lect_3 - Animal Diversity II Phylum...

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