Yes. However, this is not a true coelom. Roundworms are pseudocoelomates -- their mesoderm lines the endoderm and ectoderm, but there is no connection between the two. Therefore, it does not satisfy...
Depending upon the coelom, the animals are divided into 1)Acoelomates - Eg: Platyhelminthes 2)Pseudocoelomates Eg: Nematyhelminthes 3)Eucoelomates: - Eucoelomates are further divided into two types...