不同海拔条件下牦牛颈动脉体组织微细结构的比较研究

doi:10.11843/j.issn.0366-6964.2016.03.029

Abstract

Abstract:

To reveal the morphological structure characteristics of carotid body of Yak in different hypoxia.In this study,the morphological structures of carotid body observed by histologial，immunohistochemical methods and electron transmission microscopy techniques in health adult yaks at different altidudes in Qinghai Province，and the volume density(Vv)，surface density(Sv)，numerical density on area(N_A) and specific surface(δ) of type Ⅰ cells(light and dark)，type Ⅱ cells and microvessels in carotid body of yaks at different altitudes were compared by light microscope and microstereology.The results showed that there were many more light cells than dark cells.The type I cells contain mitochondria and electron dense-cored vesicles in their cytoplasm，in size and number of mitochondria and electron dense-cored vesicles，no significant differences between 2 of the groups were found with height of sea level.The type Ⅱ cells surrounding type Ⅰ cells were small and little.There were rich capillaries in mesenchyme，increasing diameter of the inner lumen of the capillaries with the elevation increasing.The numerical density on area and surface density of light cells were increased with height of sea level，and there were the significant difference between any 2 of the groups.The volume density，surface density and numerical density on area of dark cells gradually increased with altitude，there was the significant difference between altitude 4 600 m and altitude 2 800 m.The surface density and numerical density on area of type Ⅱ cells gradually increased with the elevation rise，and there were the significant difference between 4 600 m and 2 800 m，3 800 m respectively.The surface density and specific surface of microvessels decreased with altitude.In surface density，there was significantly different between altitude 4 600 m and 2 800 m，in specific surface，there were significant difference between any 2 of the groups.The results suggested that these type Ⅰ cells and type Ⅱ cells increased markedly in number，and the microvessels lumina dilated obviously with height of sea level.

CLC Number:

S852.16

ZHANG Shou，CHANG Lan1，LEI Nai-hu，MA Yan-fang，SHEN Ming-hua. Morphological Observation and Stereologic Study on Carotid Body of Yaks at Different Altitudes[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2016, 47(3): 630-636.

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Morphological Observation and Stereologic Study on Carotid Body of Yaks at Different Altitudes

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