Book Lungs In Spiders

The book lungs contain blood vessels that bring the blood into close contact with the surface exposed to the air and where gas exchange between blood and air occurs.

Book lungs in spiders. The inside of each leaf is filled with blood and the outside is exposed to air. Book lungs are within small openings in the abdomen of the arachnid. The book lungs the breathing organs.

Koch 1841 araneomorphae theridiidae. Some have a pair of book lungs others have several pairs. 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 each of these organs is located inside an open ventral abdominal air filled cavity atrium and connects with the surroundings through a small opening for the purpose of respiration.

Spiders consist of peculiar book lungs leaflike plates over which air circulates through slits on the abdomen. Book lungs are the main respiratory organ in most arachnids spiders and scorpions. Book lung development in the embryo postembryo and first instar of the cobweb spider parasteatoda tepidariorum c.

Tarantulas on the other hand have two pairs of book lungs. The gonopore or genital opening from which eggs or sperm are released is placed in the genital groove between the front pair of book lungs. As in the trachea the book lungs exchange oxygen and carbon dioxide through diffusion.

Spider book lungs cross section spiders have developed several different respiratory anatomies based either on book lungs or on tracheae. In most female araneomorph spiders there is another separate plaque like mating opening the epigynum. On the inside of the abdomen are.

Book lungs are a series of very thin leaf like structures like the pages in a book. The book lungs and the spiracle of the book lungs are located at the anterior end which is the front end of the spider. The book lungs themselves consist of a series of haemolymph filled plate like structures.