Kingdom ANIMALIA Subkingdom Parazoa Eumetazoa Phylum Porifera Cnidaria Platyhelminthes Nematoda Mollusca Annelida Arthropoda Echinodermata

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Kingdom ANIMALIA Subkingdom Parazoa Eumetazoa Phylum Porifera Cnidaria Platyhelminthes Nematoda Mollusca Annelida Arthropoda Echinodermata Symmetry no symmetry Radial Bilateral Bilateral Bilateral Bilateral Bilateral Bilateral larva Adult radial Body Cavity none none absent FALSE TRUE Acoelomate PseudoCoel. Coelomate Coelomate Coelomate Coelomate Organization No tissues True tissues Organ-system Organ-system Organ-system Organ-system Organ-system Organ-system Development Protostome Protostome Protostome Protostome Protostome Deutrostome Segmentation absent absent unsegmented segmented segmented Characters 2 layers 2 layers Flat worms Round worms soft-bodied serially segment Exoskeleton Spiny-skinned Choanocytes Cnidocytes solid, 3-layered complete DigSys complete DigSys completeDigSys completeDigSys Endoskeleton of Spicules Polyp, Medusa only mouth no cilia may have shell most have setae paired, jointed bony plates Filter-feeder only mouth free living or live in soil or head, foot and hydroskeleton appendages water vascular many pores parasitic animal parasite viseral mass most insects system, tubefeet rasping radula have wings high regeneration Only marine Examples Grantia Hydra Planaria Ascaris Snail Neries Insect-butterfly Sea star Physalia Flukes Oyster Earthworm Crustacea-crab Sea urchin Jelly fish Tape worm Squid Leech millipede sea cucumber Sea Anemone Octopus centipede brittle star Corals spiders feather star scorpion Chordata Bilateral Coelomate Organ-system Deutrostome segmented Notochord dorsal nerve cord pharyngeal pouches have tail most with backbone gills or lungs Heart and vessels Lamprey sharks salmon, tuna frog, salamander lizard, turtle, alligator pigeon, sea-gull kangaroo, bat, rat.

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Educators' Resource Guide
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