In biology lab,you are observing and dissecting flatworms.Their bodies are very thin,even see-through,and their thin body surface allows them to exchange gases of oxygen and carbon dioxide with the underlying cells and tissues.Flatworms lack which of the following anatomical systems?

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Quizplus · Accepted Answer

Flatworms lack a specialized respiratory system. They rely on diffusion across their body surface for gas exchange due to their thin and flat body structure.

In Biology Lab,you Are Observing and Dissecting Flatworms