Book Lungs In Arachnids

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 in arachnids. These plates extend into an internal pouch formed by. Some have a pair of book lungs others have several pairs. The book lungs located inside the arachnid are made up of several thin membranes somewhere between 10 and 80 depending the species.

Arachnids have two types of respiratory organs. This is essentially the book gill of the horseshoe crab evolved to be located within the spider s body and supplied with air through a small opening. The book lungs themselves consist of a series of haemolymph filled plate like structures.

Book lungs are the main respiratory organ in most arachnids spiders and scorpions. Fast forward to modern day spiders close relatives of the horseshoe crab. It is proposed that the control of the spiracle entrance area from the ambient to the book lungs is an essential element in controlling the acid base state of body fluids.

Book lungs are within small openings in the abdomen of the arachnid. The book lungs and the spiracle of the book lungs are located at the anterior end which is the front end of the spider. Book lungs are similar to book gills which.

Book lung form of respiratory organ found in certain air breathing arachnid arthropods scorpions and some spiders. There are characteristics that are particularly important for the terrestrial lifestyle of arachnids such as internal respiratory surfaces in the form of tracheae or modification of the book gill into a book lung an internal series of vascular lamellae used for gas exchange with the air. Scorpions have a similar setup.

Spiders have four respiratory functions that work together to enable the spider to breathe. Paul r fincke t 1989 book lung function in arachnids ii. Because of the high postactive co 2 release due to the buffering of d lactate respiration and acid base control are strongly related in the arachnids investigated.