Q.8 Distinguish between Flatworm & Roundworm.
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Flatworm adaptations include mesoderm, muscle tissues, a head region, and bilateral symmetry. Flatworms are free-living heterotrophs or parasites. Roundworms are invertebrates in Phylum Nematoda. Roundworms have a pseudocoelom and complete digestive system.
Unlike their predecessors, roundworms have a tube digestive system, meaning food flows in one direction (in one end and out the other). This is in contrast to the digestive system of the flatworms: these organisms have a single opening. ... Once the food is in the mouth, it moves down to the pharynx (or throat).
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