Which type of respiratory organs are present in spiders and scorpions?
A
Book lungs
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B
Gill books
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C
Gills
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D
Lungs
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Solution
The correct option is A Book lungs A book lung is a type of respiration organ used for atmospheric gas exchange that is found in many arachnids, such as scorpions and spiders. 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. These plates extend into an
internal pouch formed by the external skeleton that opens to the
exterior by a small slit. This provides an extensive surface for the
exchange of oxygen and carbon dioxide with the surrounding air. There
are four pairs in scorpions and up to two in spiders.