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Spider book lungs (cross section) Internal anatomy of a female spider, book lungs shown in pink. 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 ...
Spider book lungs (cross section) Spiders have developed several different respiratory anatomies, based either on book lungs or on tracheae. Mesothele and mygalomorph spiders have two pairs of book lungs filled with haemolymph, where openings on the ventral surface of the abdomen allow air to enter and oxygen to diffuse in and carbon dioxide to ...
Spiracle (arthropods) A spiracle or stigma is the opening in the exoskeletons of insects, myriapods, velvet worms and many arachnids to allow air to enter the trachea. [1][2][3] In the respiratory system of insects, the tracheal tubes primarily deliver oxygen directly into the animals' tissues. In most species the spiracles can be opened and ...
Development of the tracheal system in Drosophila melanogaster. An insect 's respiratory system is the system with which it introduces respiratory gases to its interior and performs gas exchange. Air enters the respiratory systems of insects through a series of external openings called spiracles. These external openings, which act as muscular ...
The trachea (pl.: tracheae or tracheas), also known as the windpipe, is a cartilaginous tube that connects the larynx to the bronchi of the lungs, allowing the passage of air, and so is present in almost all animals with lungs. The trachea extends from the larynx and branches into the two primary bronchi. At the top of the trachea, the cricoid ...
The lungs are the main organs of the respiratory system in most terrestrial animals, including all tetrapod vertebrates and a small number of amphibious fish (lungfish and bichirs), pulmonate gastropods (land snails and slugs, which have analogous pallial lungs), and some arachnids (tetrapulmonates such as spiders and scorpions, which have book lungs).
Spiders have developed several different respiratory anatomies, based on book lungs, a tracheal system, or both. Mygalomorph and Mesothelae spiders have two pairs of book lungs filled with haemolymph, where openings on the ventral surface of the abdomen allow air to enter and diffuse oxygen.
Arachnid. Xiphosura – horseshoe crabs. Eurypterida - sea scorpions. Arachnids are arthropods in the class Arachnida (/ əˈræknɪdə /) of the subphylum Chelicerata. Arachnida includes, among others, spiders, scorpions, ticks, mites, pseudoscorpions, harvestmen, camel spiders, whip spiders and vinegaroons. [1] Adult arachnids have eight legs ...