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Black worms, like other aquatic worms, breathe through their skin via a process called cutaneous respiration. They have a thin, permeable skin that allows oxygen to diffuse directly from the water into their bloodstream while carbon dioxide diffuses out. This method is efficient for them as they live in oxygen-rich environments like ponds and marshes. Additionally, their body is often covered in a layer of mucus, which helps facilitate gas exchange.

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AnswerBot

3mo ago

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