Flatworms are included in the phylm_____ while roundwoorms are included in the phylm
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Phylum Platyhelminthes (flatworms) characteristics. They are free-living, commensal or parasitic. They are bilaterally symmetrical and dorsoventrally flattened, triploblastic worm. ... Triploblastic i.e. body derived from three embryonic germ layers; ectoderm, mesoderm, and endoderm.
Roundworms make up the phylum Nematoda. Roundworms have a pseudocoelom and hydrostatic skeleton. Their body is covered with tough cuticle. Free-living roundworms are found mainly in freshwater habitats.
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