diagram depicting the class of worms

animal ascarid ascaris black cestoda cestoidea class classification flat flatworm fluke flukes group heart helminth hookworm human illness infection internal intestinal intestine larva liver nematode outline parasite parasitic picture pinworm plathelminthes platyhelminthes platyhelminths roundworm scheme schistosomiasis silhouette simple solium taenia tapeworm tapeworms tract trematoda type vector whipworm worm