Animal Kingdom QuestOnline version Explore the fascinating world of invertebrates and vertebrates in this educational adventure game! by Ikiyaonna Carter 1 Vertebrates 2 Mix of Vertebrate and Inverts 3 Invertebrates 4 Invertebrates2 Cyclosotomata Gnathostomes Amphibians Amniotes mammalia Primates Echinoderms Chordata Arthropoda Proifera Cnidaria Mollusca platyhelminthes annelida lack coelom, acoelomate, cerebral ganglia internal transport system, closed circulatory system, coelomate jointed appendages, exoskeleton: chitin, protein, body segments= movement