book lung


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book lung

n.
A saccular respiratory organ found in some arachnids, such as scorpions and spiders, consisting of several parallel membranous folds arranged like the pages in a book.
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Their thin air-hemolymph barrier, combined with appropriate values of respiratory surface density and book lung volume, results in high oxygen diffusion capacities allowing a good oxygen delivery even at low oxygen pressures.
2] = oxygen consumption at 20[degrees]C, BLV = book lung volume, [D.
16) accumulation of reaction product is prominent in the zymogen granules of gut diverticula, the ducts of silk glands and the walls of the air pockets in the book lung (Fig.