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platyhelminthes  0:00 - Platyhelminthes - Flatworm 1:25 - Non-Parasitic Flatworm 2:58- Three classes of The Platyhelminthes previously included the Acoela and Nemertodermatida, but morphology, embryology, and molecular phylogeny suggest that they belong to a

Platyhelminthes definition: Platyhelminthes are a phylum of soft-bodied organisms that are characterized by their bilateral symmetry (when both sides of the Considered for a long time the most basal bilaterians, the Platyhelminthes are now robustly placed within the Spiralia Despite having

Phylum Platyhelminthes Class Monogenea ~ 400 spp mostly ectoparasites of fish, amphibians Feed on blood, mucus Anterior and posterior ends for clinging Another characteristic of the platyhelminthes is cephalization, which means that one end of the animal functions as a head The “head” contains a mass of nerve