Book lungs

Definition

Respiratory organs found in arachnids, such as spiders and scorpions, consisting of stacked, leaf-like structures that allow for gas exchange.

Etymology

The term 'book lungs' originates from the resemblance of their layered, leaf-like structures to the pages of a book.

Example

Spiders utilize book lungs for the exchange of gases between their blood and the air, enabling them to breathe efficiently.

Synonyms

• Pulmonary lamellae

Related Terms

• Tracheae
• Spiracles
• Hemolymph
• Respiration
• Arachnids

Usage Notes

Book lungs are located within the abdomen of arachnids and can vary in number, with some species having two pairs and others just one.