A Planarian is an acoelomate, meaning they do not have a body cavity at all.
coelomate
no
Acoelomate
Acoelomate animals, like flatworms
Yes.
Flatworms are considered acoelomate, since they have no body cavity, and roundworms are pseudocoelomate because they have a body cavity, but it is not derived from the splitting of the mesoderm tissue. Also, flatworms only have one opening in their digestive system unlike roundworms with two.
Some of the general features of acoelomate animals include internal cavity for digestion, bilateral symmetrical, organ system organization and so on. These features are the ones that distinguish acoelomate animals.
A Cheetah has bilateral symmmetry and it is an acoelomate because they do not have a coelom
yes
Flatworms
Acoelomate
Lake Pedder planarian was created in 1974.