| Share
 

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 © 2012, Columbia University Press. All rights reserved.

More on book lung from Infoplease:

  • book lung: meaning and definitions - book lung: Definition and Pronunciation
  • 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 ...
  • Chelicerata - Chelicerata Chelicerata , phylum of the living horseshoe crabs (class Merostomata), the arachnids ...
  • scorpion - scorpion scorpion, any arachnid of the order Scorpionida with a hollow poisonous stinger at the tip ...

See more Encyclopedia articles on: Biology: General