Phylum : Aschelminthes/Nemathelminthes (round or thread worms), its classification and characteristics
multicellular, triploblastic, bilaterally symmetrical with system grade of body organization. tube within tube body plan. mostly parasitic, few are free living found in sea water, fresh water or damp soil. body is elongated, cylindrical, unsegmented without lateral appendages. body is covered by cuticle, formed by syncytial epidermis. body cavity is pseudocoel. Thus, they are pseudocoelomate. … Read more