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Roundworms are among several phyla of animals known as pseudocoelomates. They are so named because they have a pseudocoelom, a hollow, fluid-filled cavity that is lined by mesoderm on the outside and endoderm on the inside.
What else can I help you with?
How are rotifers different from round worms?
I am thinking that they just differ in their physical structures; both contain pseudocoeloms
What do you mean by true coelom?
The coelom is the body cavity of an animal. A true coelom is a body cavity that is complete from mouth to anus with no breaks; there are animals that have pseudocoeloms - mouths and anuses but no solid connection between the two.
What type of coelom is lined on both sides by mesoderm?
The type of coelom that is lined on both sides by mesoderm is called a "true coelom." True coeloms are found in animals classified as coelomates, which include phyla such as annelids, mollusks, and vertebrates. This body cavity is fully enclosed by mesodermal tissue, allowing for the development of complex organ systems and greater body organization.
