What are the distinctive features of the structure of the respiratory organs of reptiles in comparison with amphibians?

In adult amphibians, the respiratory organs are saccular lungs and moist skin. In reptiles, the skin is dry, devoid of glands and covered with a continuous horny cover. Therefore, only the lungs are their respiratory organ. They have a cellular structure, due to which a large gas exchange surface is formed. Atmospheric air from the nasal cavity enters the larynx, trachea, then into the bronchi and their branches, and then into the cells of the lungs. The air passing through the trachea and bronchi is moistened and, entering the lungs, does not dry out them. Therefore, reptiles have also settled in the dry regions of the planet – deserts, savannahs.

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