introduction of Nemathelminthes

  Nemathelminthes:-(aschelminthes)

                   They are also commonly called roundworm. Their bodies are round but non segmented. They are endoparasite generally . They are generally unisexual animals.  Their mouth is provided with suckers.Some are found inside the body of human beings.Generally these animals completes life cycle in two hosts.More than 12000 species are known till now.