You searched for: “book lung
book lung
A terrestrial respiratory organ characteristic of arachnids; such as, scorpions and primitive spiders.

Each book lung consists of hollow flat plates and air goes over the outer surface of the plates and bodily fluid circulates within them, facilitating the exchange of gases.

In most species, adequate gas exchange occurs without any muscular movement to ventilate the lungs.

This entry is located in the following unit: Insects, General Applicable Terms (page 2)