they are flat
Nematodes have a pseudocoelom (a body cavity that is not completely lined by mesoderm), whereas flatworms have an acoelomate body plan (lack a body cavity). This means that nematodes have a body cavity, while flatworms do not have a true body cavity.
flatworms are the only triploblastic organisms that lack a coelom
Flatworms
No, a flatworm does not have a body coelom.
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Flatworms, such as tapeworms and planarians, are examples of acoelomate animals. These animals lack a true body cavity called a coelom and have a solid body structure instead.
Bilateral symmetry.
flatworms live in lakes and rivers. they also dont have a resptory or a circulatory system. they eliminate wastes through the body walls using diffusion.
body description of a maltese
Acoelomate animals, like flatworms
Flame cells.. yw
Yes, flatworms belong to the phylum Platyhelminthes and do possess a mesoderm. They are acoelomate organisms, meaning they lack a true body cavity, but they have three germ layers: ectoderm, mesoderm, and endoderm. The mesoderm in flatworms contributes to the formation of muscles and other internal structures.