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book lung

book lung, terrestrial respiratory organ characteristic of arachnids such as scorpions and primitive spiders. Each book lung consists of hollow flat plates. Air bathes the outer surface of the plates and blood circulates within them, facilitating the exchange of gases. In most species, adequate gas exchange occurs without any muscular movement to ventilate the lung.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved.

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book lung: meaning and definitions - book lung: Definition and Pronunciation
Suggestions for spelling of encyclopedia/book lung - The Infoplease spelling checker combines spelling help with our dictionary and thesaurus
arachnid - arachnid arachnid , mainly terrestrial arthropod of the class Arachnida, including the spider, ...
spider - spider spider, organism, mostly terrestrial, of the class Arachnida, order Araneae, with four pairs ...
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