Question Detail
Question
The _____ is a type of respiratory organ used for atmospheric gas exchange, found in arachnids, such as scorpions and spiders.
Correct Answer
Option A is the correct answer.
Detailed Explanation
Book lungs are unique respiratory organs found in many arachnids. They consist of a series of highly folded, plate-like tissues (lamellae) that resemble the pages of a book, providing a large surface area for gas exchange with the air. Trachea and spiracles are respiratory structures in insects, while gills are for aquatic respiration.
Hint
This specialized respiratory organ in arachnids gets its name from its folded, leaf-like appearance.