Flatworms
Acoelomate
Acoelomate animals, like flatworms
A Planarian is an acoelomate, meaning they do not have a body cavity at all.
Acoelomate is an animal that lacks a body cavity or a coleom.
The type of body plan a Dugesia has is an acoelomate body. This elongated body lacks internal structures for holding internal organs.
Molluscs are acoelomate; they have no body cavities.
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.
tapeworm.
coelomate
Acoelomate
No a Hydra is non a pseudocoelmate, acoelomate, or eucoelomate. The basic body plan is a sac with central digestive compartment, the gastrovascular cavity. A single opening functions as mouth and anus. There are 2 variations on this body plan: the sessile polyp and the motile medusa
Lower phyla in the animal kingdom such as Cnidarians, Porifera, and Ctenophora.