What are the Differences between Flatworms Roundworms and Segmented Worms. A worm is a worm is a worm. Nematodes differ considerably from annelids, however, and that is why they are in separate phyla. Nematodes are not segmented and their body cavity or coelom forms in a completely different way to the annelid coelom.
So, how are flatworms and roundworms different?
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.
How do the flatworms roundworms and segmented worms differ from each other?
Roundworms only have a body cavity, and segmented worms have both a body cavity and segments. Flatworms (Phylum Platyhelminthes) have incomplete digestive systems. That means that their digestive system has only one opening. The gas exchange occurs on the surface of their bodies.
Are flatworms and tapeworms the same thing?
Tapeworm, also called cestode, any member of the invertebrate class Cestoda (phylum Platyhelminthes), a group of parasitic flatworms containing about 5,000 species. Tapeworms are bilaterally symmetrical (i.e., the right and left sides are similar).