Shi-Yuan Yu2, Xiao-Hua Du3, Hai-Yan Li1, Jian-Lin Wang and Zi-Ren Wang
School of Life Science, Lanzhou University, Lanzhou, Gansu, 730000, P.R. CHINA
1Department of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu, P.R. China 730070.
2School of Life Science, Northwest Normal University, Gansu, P.R. China, 730070.
3School of Veterinary Medicine, Gansu Agricultural University, Gansu, P.R. China 730070.
ABSTRACT
The subpleural microvessel of the lung in the bactrian camel (Camelus bactrianus) was studied with the replica scanning electron microscopic method. The results showed that the microvessels of the lung arranged densely, branched and coursed regularly, of which the corrosion casts revealed a complex three-dimensional network completely. According to the microvascular architecture, the subpleural microvessel mainly comprised the arteriole, terminal arteriole, precapillary arteriole, and capillary. Sometimes, the terminal arteriole directly gave rise to large number of capillaries which anastomosed with each other, forming the subpleural capillary network. The network was loose, in which the diameter of the mesh was larger than that of the capillary, and the mesh was often hexagon and pentagon in appearance. There are obvious impressions of the smooth muscles on the surface of the casts of the arteriole, the terminal arteriole and the precapillary arteriole. On the surface of the casts of the precapillary arteriole and the capillary, there are obvious impressions of the endothelial nuclei as well.
Key words : Bactrian camel, lung, scanning electron microscopy (SEM), subpleural microvessel
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