Ustiuzhaninova N V, Shishkin G S
Arkh Anat Gistol Embriol. 1981 Sep;81(9):106-10.
Structure of the interalveolar septa in the lungs of typical representatives of the Arctic Zone--Arctic foxes--has been studied electron microscopically in comparison with those of dogs from the middle zone of West Siberia. Structure and parameters of the dog pulmonary septa correspond to modern notion on ultrastructure of the respiratory system in animals of middle latitudes. In the Arctic fox a certain combination of morpho-functional peculiarities is observed contributing to an increased diffuse power of the lungs. The capillary ultrastructure of the animal is considerably changed. capillaries with double aerohematic barrier make a greater part of the capillary network (57%), area of the barrier is nearly twice as large (in dogs--37%, in Arctic foxes--65%). A great amount of Cohn's pores in the Arctic boxes (twice as great as in the dogs) is a peculiar feature for the Arctic fox pulmonary septum. The morpho-functional peculiarities stated contribute to an increased diffuse rate and to better saturation of blood with oxygen.
对北极地区典型代表动物——北极狐肺部肺泡间隔的结构进行了电子显微镜研究，并与西西伯利亚中部地区的狗的肺部结构进行了比较。狗肺间隔的结构和参数符合现代关于中纬度地区动物呼吸系统超微结构的概念。在北极狐中，观察到了一定的形态功能特性组合，这有助于提高肺部的弥散能力。该动物的毛细血管超微结构发生了显著变化。具有双重气血屏障的毛细血管在毛细血管网络中占比更大（57%），屏障面积几乎是狗的两倍（狗为37%，北极狐为65%）。北极狐肺部有大量的孔氏孔（是狗的两倍），这是北极狐肺间隔的一个独特特征。上述形态功能特性有助于提高弥散速率，并使血液更好地与氧气结合。
