Which are the morphological features that differentiate the beings of the phylum Annelida from nematodes and platyhelminthes?

Which are the morphological features that differentiate the beings of

1.	Which are the morphological features that differentiate the beings of the phylum Annelida from nematodes and platyhelminthes?
Answer» Platyhelminthes are worms with flat bodies (flatworms), nematodes are worms with cylindrical but not segmented bodies (roundworms). Annelids are cylindrical worms with segmented bodies (they are metameric).