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[–] derram ago 

https://archive.fo/qzY2C :

Dinosaurs Had Birdlike Lungs - Scientific American Blog Network

'Did non-avian dinosaurs have lungs similar to those of modern birds, or does the avian lung have a more recent evolutionary origin?'

'This is a useful finding, given that non-avian dinosaurs could then be categorized as more crocodile-like or as more bird-like in pulmonary anatomy. '

'As Robert Brocklehurst, Emma Schachner, and William Sellers point out in a new study, it’s just this kind of anatomical outline that can tell us a little more about non-avian dinosaur lungs. '

'As might be expected given their different modes of life and over 235 million years of separate evolutionary trajectories, bird and crocodile lung anatomy differed significantly. '

'The physiological consequences of having more bird-like lungs likely made non-avian dinosaurs more efficient at taking up oxygen from the air than other vertebrates, Brocklehurst and colleagues write, an advantage when atmospheric oxygen levels sometimes dropped. '


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