Chloe Kim #1 of the United States competes in the FIS World Cup 2018 Ladies Snowboard Halfpipe final during the Toyota U.S. Grand Prix on December 9, 2017 in Copper Mountain, Colorado. Matthew StockmanâGetty Images.
The phylum name Platyhelminthes literally means flatworms.. Members of this phylum are soft, thin-bodied, leaf or ribbonlike worms, including the familiar planaria of ponds and streams, as well as the flukes and tapeworms parasitic in human and other animal bodies.
Platyhelminthes are also known as flatworms because they are worms with a flat body. This is the main external morphological feature that differentiates them from nematodes (roundworms).. The most well-known representatives of platyhelminthes are worms that cause human diseases, such as taenia and schistosome. Planaria, since it has been extensively studied in Biology, is also well-known.