Differentiate between Platyhelminthes & Annelids
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Platyhelminthes have only one opening while annelids have 2 openings
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Platyhelminthes don't have a body cavity. Whereas, Nematodes have a body cavity that they can put more complex organ systems in. Platyhelminthes have a gastrovascular cavity or no digestive system and have no segments.Nematodes have no circulatory system and it consists of round worms
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