In some animals, the body cavity is not lined by mesoderm; instead, the mesoderm is present as scattered pouches. This is known as:
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Correct answer: Pseudocoelom
A pseudocoelom is found in Aschelminthes (roundworms). Because the cavity is not fully lined by mesoderm, these animals are categorized as pseudocoelomates.
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More Basis of Animal Classification questions
- Which of the following phyla is characterized by the absence of a body cavity (acoelomate condition)?
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- In an open circulatory system, the blood is:
- An incomplete digestive system has: