book lung मीनिंग इन हिंदी

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Both their book lungs and the anterior median eyes.
The bottom side of the abdomen is usually brown with yellow book lungs.
Book lungs are not related to the lungs of modern land-dwelling vertebrates.
The unfolded " pages " ( plates ) of the book lung are filled with hemolymph.
See branchiostegal lung and book lung.
Recent Mesothelae are characterized by the narrow mygalomorph spiders, they have two pairs of book lungs.
The respiratory system consists only of book lungs, which could help explain why they are relatively inactive.
In a very few species the book lungs have developed deep channels, apparently signs of evolution into tracheae.
Unlike almost all other araneomorph or " true " spiders, members of the family have four book lungs.
Like the " primitive " suborder of spiders Mesothelae, they have two pairs of book lungs, and downward pointing chelicerae.

संज्ञा.

organ in many arachnids containing many thin folds of membrane resembling the leaves of a book