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This Concept Map, created with IHMC CmapTools, has information related to: Chapters 22-26, Echinoderms ???? Aquatic Animals, Annelida ???? Segmented Worms Earthworms Oligocheta Polychaeta Hirudina Leeches, Platyhelminthes ???? Size ranges from microscopic to 20m Parasites Most Free-Living (Non-Parsitic) Feed on small & dead animals Very flat for oxygen exchange Flame Cells, Labs ???? Turtle Dissection, 8 Phyla ???? Echinoderms, Nematoda ???? Intesines of Host Tropical Regions, 8 Phyla ???? Mollusca, Arthropoda ???? Anywhere, Labs ???? Animal Phyla Survey, Arthropoda ???? Insects Crustaceans Arachnids, Cnidarians ???? Jellyfish Sea Anemone Coral Sea Fan, 8 Phyla ???? Porifera, 8 Phyla ???? Cnidarians, Porifera ???? Sponges, Platyhelminthes ???? Internal Organs of Host Fresh Water, Annelida ???? Size varies from 1mm to 3m Segmented Bodies Have True Coelom, Nematoda ???? Parasites Unsegmented Have Pseudocoeloms 2 Openings - Mouth & Anus, 8 Phyla ???? Annelida, Mollusca ???? Cephlapods Bivalves Gastropods, Cnidarians ???? Name comes from the cells called cnidoytes (stinging cells on tentacles)