Animal Kingdom - ANIMAL KINGDOM Eukaryotic, multi-cellular,...

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A NIMAL K INGDOM Eukaryotic, multi-cellular, heterotrophic, have motility. 10 Phyla: Porifera, Cnidarians, Echinoderms, Mollusks, Rotifera, Platyhelminthes, Nematodes, Annelid worms, Arthropods (largest group), Chordates. Porifera: simplest animals, lack symmetry (asymmetrical). - sponges > have motility, but are sedentary/sessile. > They’re called Porifera for their pores. Water enters through the ostium, exits through the osculum. > They’re gastrovascular ; have a gastrovascular cavity that functions in both digestion and supplying nutrients to the body. > Filter-feeding system by ostia (they filter food out of the water). > Have evolved a form of defense – have tiny spicules (spikes) in their internal cavity to stop organisms from digesting it. > Only ectoderm and endoderm. Cnidarians: symmetry evolved (radial- infinite symmetry) They have alternation of generations (between Polyp– tube-like, Medusa- jelly-like). 2 body forms. Mostly made of bags of water.
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Animal Kingdom - ANIMAL KINGDOM Eukaryotic, multi-cellular,...

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