what distinguishes flatworms from other kinds of worms
Three types of worms with different body types will be explored in this lesson: 1  Flatworms, which have ribbon-like bodies with no body cavity. 2  Roundworms, which have a body cavity but no segments. 3  Segmented worms, which have both a body cavity and segmented bodies.haracteristics of Flatworms. There are specific differences between the flatworms and the roundworms. 1  Unlike the flatworms, the roundworms have a body cavity with internal organs. 2  A roundworm has a complete digestive system, which includes both a mouth and an anus.
â¢ Roundworms have a rigid outer covering called the cuticle. Often, flatworm has cilia on the surface of its body and not cuticle. â¢ Flatworms are acoelomates that they do not have a body cavity, whereas roundworms are psuedocoelomates.â¢ Flatworms have only one opening, which functions as both mouth and anus. However, roundworms have a complete digestive tract, with two separate openings for the mouth and anus. Roundworms have a rigid outer covering called the cuticle. Often, flatworm has cilia on the surface of its body and not cuticle. â¢ Flatworms are acoelomates that they do not have a body cavity, whereas roundworms are psuedocoelomates.