book lung

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book lung

anatomy

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National Center for Biotechnology Information - PubMed Central - The ultrastructure of book lung development in the bark scorpion Centruroides gracilis (Scorpiones: Buthidae)

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National Center for Biotechnology Information - PubMed Central - The ultrastructure of book lung development in the bark scorpion Centruroides gracilis (Scorpiones: Buthidae)

Also known as: book trachea

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Category: Science & Tech

Related Topics:: arachnid; spiracle

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book lung, form of respiratory organ found in certain air-breathing arachnid arthropods (scorpions and some spiders). Each book lung consists of a series of thin plates that are highly vascular (i.e., richly supplied with blood) and are arranged in relation to each other like the pages of a book. These plates extend into an internal pouch formed by the external skeleton that opens to the exterior by a small slit. This provides an extensive surface for the exchange of oxygen and carbon dioxide with the surrounding air. There are four pairs in scorpions and up to two in spiders.

This article was most recently revised and updated by Kara Rogers.