It originates in the same way as the lungs of air-breathing vertebrates, and in the adult may retain a tubular connection with the pharynx or esophagus. A sac or bladder full of air in an animal or plant
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air-breathing arthropods characterized by simple eyes and four pairs of legs
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small air-breathing arthropod
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n small air-breathing arthropod n a person who has a nasty or unethical character undeserving of respect
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air-breathing fish having an elongated body and fleshy paired fins
