Question: Q: What is a fluid-filled body cavity that is completely enclosed by mesoderm called?   Read this paragraph and choose the correct option from the provided answers:  Later, a true coelom evolved. This is a fluid-filled body cavity that is completely enclosed by mesoderm. The coelom lies between the digestive cavity and body wall. You can see it in the invertebrate in Figure below . Modern invertebrates with a coelom include mollusks (Phylum Mollusca) and annelids (Phylum Annelida).   Choices:  - pseudocoelom  - hymenium  - choroid  - coelom   A:
Answer:
coelom