title: [Features of the architectonics of the bronchial tree of the polar fox as a manifestation of adaptation of the lungs to northern conditions].
abstract: Peculiarities of the bronchial tree architectonics as a whole and in the pulmonary lobes have been studied in the animal of the Arctic zone--the Arctic fox in comparison with the dog. Certain species-specific differences in the form and branching of the bronchial tree have been stated. In the Arctic fox the subsegmentary bronchi are more developed, they are longer, with greater number of branchings and, thus, more interlobular bronchioles run off from them. Besides, up to 10% of interlobular additional bronchioles take their origin from the segmentary bronchi and as a result the bronchial tree of the Arctic fox is 1.5 times as thick as that of the dog. Complexes of the branches in the subsegmentary bronchi, or in large interlobular bronchioles of the Arctic fox are well isolated from each other and make the base of the subsegments of two types. The architectonic peculiarities are connected with genetically secured adaptation of the animal to low temperature of the environment, since they improve warming and mixing the inhaled cold air with the warm alveolar air.
mesh_terms: D000220:Adaptation, Biological; D000818:Animals; D001110:Arctic Regions; D001980:Bronchi / Q000033:anatomy & histology*; D003081:Cold Climate; D004285:Dogs; D005589:Foxes / Q000033:anatomy & histology*; D012800:Siberia; D013045:Species Specificity; D014132:Trachea / Q000033:anatomy & histology
vernacular_title: Osobennosti arkhitektoniki bronkhial'nogo dereva pestsa, kak proiavlenie adaptatsii legkikh k usloviiam Severa.