Book Lungs Definition Example

A book lung is a type of respiration organ used for atmospheric gas exchange and is found in arachnids such as scorpions and spiders.

Book lungs definition example. Like spiders they were terrestrial and respired through book lungs and walked on eight legs. Respiration takes place through the body surface. Book lung form of respiratory organ found in certain air breathing arachnid arthropods scorpions and some spiders.

Primitive lungs of many arachnids consisting of pagelike layers of tissue over which. Meaning pronunciation translations and examples log in dictionary. Diagram of book lungs.

Book lung definition is a saccular breathing organ in many arachnids containing thin folds of membrane arranged like the leaves of a book. Each of these organs is found inside a ventral abdominal cavity and connects with the surroundings through a small opening. Some like the wolf spiders have both book lungs and tracheae.

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. Book lungs are not related to the lungs of modern land dwelling vertebrates. They are situated in the abdomen and have openings on the underside.

1 is the slit to outside of the body 2 is the area filled with hemolymph and 3 is the book lung pages or membranes the book lungs located inside the arachnid are made up. Most spiders breathe through tracheae.