成年高原藏羊睾丸小叶内微血管分布和形态特征  

Distribution and morphological characteristics of testis lobule micrangium in adult Tibetan plateau sheep

作　　者：孙英[1] 袁莉刚[1] 赵海涛[1] 

机构地区：[1]甘肃农业大学动物医学院,兰州730070

出　　处：《解剖学报》2011年第1期114-118,共5页Acta Anatomica Sinica

基　　金：甘肃省自然科学研究基金资助项目(1010RJZA210);甘肃省教育厅科学基金资助项目(0902B-03);甘肃农业大学创新基金资助项目(GAU-CX0513)

摘　　要：目的探讨成年高原藏羊睾丸小叶微血管构筑特征。方法采用ABS树脂血管铸型技术、扫描电镜观察法、墨汁明胶石蜡切片及常规石蜡切片技术,观察30只成年高原藏羊睾丸小叶微血管的构筑特征。结果睾丸小叶内由向心或离心动脉发出的管间微动脉及管间毛细血管穿行于相邻生精小管形成的结缔组织间隙内;管间毛细血管相互交通形成管周毛细血管围绕生精小管之外;在生精小管周围毛细血管间存在不同程度的吻合;小叶内小动脉、管间微动脉、毛细血管前微动脉的血管铸型表面均显示有清晰的、环状排列的平滑肌细胞形成的环状缢痕;管间微动脉、管间毛细血管的铸型表面显示有清晰的卵圆形内皮细胞核的压痕。结论血管铸型结构表明,高原藏羊睾丸小叶的微血管分布具有显著的高海拔低氧适应特征。Objective To study the architecture of the testis lobule micrangium and its functional relationship in 30 adult Tibetan plateau sheep. Methods The ABS vascular proplasm, ink-gelatinum paraffin section and replica scanning electron microscopic methods were used. Results The small arteries from the centripetal or centrifugal artery walked through the polygonal tissue space, and so as the distribution of the small veins. The interstitial capillary also went along the longitudinal wall of the seminiferous tubule and formed ladder-like capillary network, and give branches interconnected each other to form peritubular capillaries. The peritubular capillaries also formed interstitial capillary plexus around the Leydig cells; Moreover, the broad and different level communications were found in microvasculature around the seminiferous tubules of the testis lobule. There were obvious imprints of the smooth muscles on the surface of the casts of the intralobular small arteries, the interstitial arteriole and the precapillary arteriole. On the surface of the casts of the interstitial arteriole and the precapillary arteriole, there were obvious imprints of the endothelial nuclei as well. Conclusion Several testis lobule micrangium structural features are abserved in Tibetan plateau sheep. It could be the result of their living in lower-oxygen on Tibetan plateau from generation to generation.

关 键 词：睾丸小叶 微血管 墨汁明胶石蜡切片 扫描电镜 藏羊 

分 类 号：S852[农业科学—基础兽医学]