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Other Platyhelminthes characteristics shared by these creatures is they are bilaterally symmetrical, this means the left and right sides of their bodies are mirror images of each other. They have distinctive head and tail ends and their body contains three cell layers.
Characteristics. Platyhelminthes is a term that covers some thirty four thousand species of flat worm. The following gives a brief outline of the Platyhelminthes characteristics shared by these creatures. The word Platyhelminthes comes from the Greeks words â platy â meaning flat and â helmins â meaning worm.