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. The name of the phylum derives from the Greek platy meaning flat and helminth meaning worm.. The Platyhelminthes are the simplest animals that are bilaterally symmetrical and formally triploblastic (composed of three fundamental cell layers).http://www.tolweb.org/Bilateria/2459. Four Clades or Classes of Platyhelminthes: Turbellaria-The Free-Living Flatworms.omplex, through incomplete gut in free living forms, absent in some parasitic forms. The following organ systems are present. Integumentary system :The epidermis is composed of a wholly or partially ciliated, syncytial or cellular epithelium, with gland cells and sensory nerve endings.