The protostomia and larvae have molting. Animals in this group, there are several phyla, such as
.Phylum Nematoda (Phylum Nematoda) animal found in general both in inland waters and salt marsh soil Animals with no segment body cylinder body area called these animals that round worm (round worm).Nematode worms have a complete. No gastrointestinal blood flow conveyor nutrients by fluid within the channel artificial ones (pseudocoelom) found only longitudinal muscle
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