EVERYDAY SCIENCE

Detailed explanation-1: -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.

Detailed explanation-2: -Spider Breathing Instead breathing takes place through a kind of passive diffusion. Arachnids have two types of “breathing” apparatuses. The first are called book lungs. Although they are referred to as lungs, they have little resemblance to human lungs.

Detailed explanation-3: -Some spiders do not have any book lungs at all, instead, breathe through tracheal tubes like insects. Most other spiders only have one pair of book lungs, this is what makes tarantulas so unique in this segment.

Detailed explanation-4: -A book lung is a type of respiration organ used for atmospheric gas exchange that is present in many arachnids, such as scorpions and spiders.

Detailed explanation-5: -Book lungs are made of ‘’pages” of thin membranes referred to as lamellae. The lamellae possess air pockets through which hemolymph, the arachnid equivalent of human blood, flows. During respiration, air enters the book lungs via slits called spiracles located in the abdomen of an arachnid.