How are flatworms similar to roundworms?

Explanation

Flatworms belong to the phylum Platyhelminthes while roundworms belong to the phylum Nematoda. The main difference between flatworms and roundworms is that flatworms consist of a dorso-ventrally flattened body whereas roundworms consist of a cylindrical body tapered to a fine point at each end. Both the worms are bilaterally symmetrical. Bilateral Symmetry is in which similar anatomical parts are arranged on opposite sides of a median axis so, one and only one plane can divide the individual into essentially identical halves. That is the only similarity, they bear. An acoelomate is an animal that has no internal, fluid-filled body cavity separating its body wall from its digestive tract. Moreover, both are triploblastic, i.e. they have three germ layers. that