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Aquatic insects have developed diverse respiratory adaptations to survive in water, where oxygen availability is limited compared to air. One common method is cutaneous respiration, in which oxygen diffuses directly through the thin body surface into the tissues. This method is efficient in small or soft-bodied insects such as some larvae. Another adaptation is the use of gills, which are thin, filamentous or ______ ___ ___ __________ ____ _____ __________ _____ ____ _________ ______.
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