Which term refers to animals that have a fluid-filled cavity that separates the gut from the muscles of the body wall and which is completely lined by the peritoneum?

Question

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Coelomates are animals that possess a true coelom, which is a fluid-filled body cavity completely lined by tissue derived from mesoderm, specifically the peritoneum. This cavity separates the digestive tract from the outer body wall, allowing for more complex and efficient body structures and organ systems.

Which Term Refers to Animals That Have a Fluid-Filled Cavity