Topics: Phylum Nematoda, Round worms, Nematoda, Class Phasmeda, Class Aphasphida, Ascaris lumbricoides, Hookworm, Dog Hookworm, Pin Worms

Topics: Acoelomate, Platyhelminthes, PHYLUM PLATYHELMINTHES, Flatworms

Topics: phylum annelida, annelida, Metamerism, coelomic inclusion

Topics: phylum porifera, Sponges, Sponges Canal

Topics: PHYLUM CNIDARIA, PHYLUM CTENOPHORA, Hydrozoa, Scyphozoa, Anthozoa, Cubozoa, Tentaculata, Nuda

Topics: cellular metabolism, cell, genetic, development, taxonomy, phylogeny, unicellular eukaryotes, sponge, placozoan, cridarian, ctenophore, acoelomorpha, platyzoa, mesozoa, polyzoa, kryptrochozoa, mollusc, annelid, allied taxa, ecdysozoans, trilobites, chelicerates, myriapod, crustacean, hexapod, chaetognath, echinoderm, hemichordate, chordate, fish, tetrapod, amphibian, aminote, nonavian reptile, bird, mammal, support, protection, movement, homeostasis, digestion, nutrition, nervous coordination, nervous system, nervous coordination, sense organ, chemical coordination, immunity, animal behavior, animal distribution, animal ecology

Topics: Amoeba feeding, Amoeba, Euglena, Paramecium, protozoa

Topics: Mandibulate, Chelicerate, Trilobita, Crustacea, Chelicerata, Uniramia, insecta