Book lungs of Arachnida.

Book lungs are respiratory organs found in some arachnids, a class of joint-legged invertebrates that includes spiders, scorpions, and certain other arthropods. These specialized structures play a crucial role in facilitating gas exchange, allowing arachnids to extract ______ ____ ______ ______ ___ _____ ____ ________ ____ ______ ____ _________.
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