Sponges, Cnidarians, Flatworms, Roundworms
Sponges, Cnidarians, Flatworms, Roundworms. Ch 26 Turboblast Version. Sponges. Aquatic, sessile, asymmetrical, filter-feeding invertebrate Lack tissues, organs, organ systems (simple bodies) Osculum - expels water and wastes at the top of sponge (a little like a smoke stack)
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