成年牦牛心室肌微血管床的形态学特征  

Morphological observation of the microcirculatory bed in the ventricular myocardium of mature yak

作　　者：贺延玉[1] 崔燕[1] 

机构地区：[1]甘肃农业大学动物医学院,甘肃兰州730070

出　　处：《中国兽医科学》2007年第4期338-341,共4页Chinese Veterinary Science

基　　金：国家自然科学基金资助项目(30571342)

摘　　要：对6头健康成年牦牛颈静脉放血致死并取出心脏,经左右冠状动脉同时灌注甲醛碳素墨水,再经40 g/L多聚甲醛水溶液充分固定,取心室组织块石蜡包埋、切片,光学显微镜观察,显微镜测微尺测量并照相。结果显示,牦牛心室微循环床中微动脉的直径小于100μm,以分叉状或梳状发出分支,走行多弯曲,呈蛇行状或螺旋状。终末微动脉管径均小于15μm。牦牛的毛细血管直径小于10μm。毛细血管之间形成H形或Y形的广泛吻合。吻合的毛细血管主要有3种不同的来源。牦牛微静脉的直径小于300μm,呈树根样结构。一条微静脉由若干条不同来源的毛细血管结合而成。牦牛心室肌中存在着动静脉吻合。The hearts of six healthy yaks died of bleeding from jugular veins were quickly moved from the thoraxes. Then the ventricular myocardium were affused with the perfusion liquid mixed with carbon ink and formaldehyde through the right and left coronary arteries simultaneously. The heart was fixed with 40 g/L paraformaldehyde completely, then sampled, embeded with paraffin and made the slice, observed by light microscope, measured and photographed. The results showed that the diameters of yak＇s arterioles, which was throw out branches as dichotomous or pectinate figure and tend towards snake or spirality,in the microcirculatory bed in the ventricular myocardium are less than 100μm. The yak＇s terminal arterioles are less than 15μm in diameter. The diameters of the yak＇s capillaries are less than 10μm, and H or Y types of capillary anastomosis were found frequently. The capillaries which anastomosed each other derive from three different kinds of sources. The diameter of laries from different arterioles sources, was less than was tree root-like pattern. It was concluded that there yak＇s venule,which was composed of several capil- 300μm,and the typical characteristic of the venule were arteriovenous anastomosis in yak＇s heart.

关 键 词：牦牛 微动脉 毛细血管 微静脉 

分 类 号：S852.13[农业科学—基础兽医学]