Biomaterial Database

[Comparative electron microscopic study of interalveolar septa in Arctic foxes and dogs]. 1981

N V Ustiuzhaninova, and G S Shishkin

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.

UI	MeSH Term	Description	Entries
D011650	Pulmonary Alveoli	Small polyhedral outpouchings along the walls of the alveolar sacs, alveolar ducts and terminal bronchioles through the walls of which gas exchange between alveolar air and pulmonary capillary blood takes place.	Alveoli, Pulmonary,Alveolus, Pulmonary,Pulmonary Alveolus
D002196	Capillaries	The minute vessels that connect arterioles and venules.	Capillary Beds,Sinusoidal Beds,Sinusoids,Bed, Sinusoidal,Beds, Sinusoidal,Capillary,Capillary Bed,Sinusoid,Sinusoidal Bed
D004285	Dogs	The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)	Canis familiaris,Dog
D005589	Foxes	Any of several carnivores in the family CANIDAE, that possess erect ears and long bushy tails and are smaller than WOLVES. They are classified in several genera and found on all continents except Antarctica.	Alopex,Arctic Fox,Pseudalopex,Red Fox,Urocyon,Vulpes,Vulpes vulpes,Fox, Arctic,Fox, Red
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D001110	Arctic Regions	The Arctic Ocean and the lands in it and adjacent to it. It includes Point Barrow, Alaska, most of the Franklin District in Canada, two thirds of Greenland, Svalbard, Franz Josef Land, Lapland, Novaya Zemlya, and Northern Siberia. (Webster's New Geographical Dictionary, 1988, p66)
D012800	Siberia	A region, north-central Asia, largely in Russia. It extends from the Ural Mountains to the Pacific Ocean and from the Arctic Ocean to central Kazakhstan and the borders of China and Mongolia.	Russian S.F.S.R., Asian,Russian Federation (Asia)
D013045	Species Specificity	The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species.	Species Specificities,Specificities, Species,Specificity, Species