鸟纲蜗管微血管的比较解剖学观察

Comparative anatomical study of the microvessel in chick cochlea

目的 :了解鸡内耳蜗管微血管的超微结构 ,为相关研究提供资料。 方法 :分别应用透射电镜和扫描电镜对 10只成年鸡内耳蜗管微血管的超微结构进行观察。结果 :鸡内耳蜗管组织中未见典型的薄壁毛细血管 ,基底膜中未见微血管分布 ;鸡耳蜗组织中的微血管管壁较厚 ,从内皮细胞至周边基膜间有呈交替排列的多层纤维、周细胞及其胞突 ;血管盖的每条皱襞中都含有 1条微血管 ,螺旋神经节内微血管与蜗管内的微血管结构相似 ;扫描电镜下 ,微血管表面周细胞胞突交织成网状。结论 :鸡内耳蜗管微血管与哺乳纲动物内耳蜗管微血管的超微结构及分布有较大差别 ,其意义尚待进一步探讨。

Objective:In order to providing information for related research, the ultrastructure of microvessel in chick cochlea was investigated.Method:Transmission electronic microscope and scanning electronic microscope were used to observe the ultrastructure of microvessel in cochleas of 10 chicks.Result:None typical blood capillary with thin-wall was found in chick cochleas, none microvessel was found within basilar membrane, the wall of microvessel in chick cochleas was thick, many lays of fibrils and pericytes and its processes were lined alternately from the endothelial cells to the peripheric basement membrane. Every fold of tegmentem vasculosum contained a microvessel. The ultrastructure of microvessel in spiral ganglion was similar to that of tegmentem vasculosum. The processes of pericyte were netted each other on the surface of microvessel.Conclusion:The ultrastructure and the distribution of microvessels in chick cochlea are differented significantly to that of cochlea in mammal.The significance should be investigated further.