摘要
应用解剖学和组织学方法观测双峰驼肾脏的形态与结构 ,探讨其构造特征与排泄高浓缩尿之间的关系。结果显示 ,驼肾体积庞大 (平均左肾 19cm× 14cm× 9cm ,右肾 18cm× 14cm× 8cm ) ,左右两肾约占体重的 0 .6 % ;髓质与皮质的厚度比为 4 1,髓袢极长 ;皮质中长袢型髓旁肾单位和中间肾单位比短袢型浅表肾单位多 ;皮质迷路内近曲小管远比远曲小管长 ;髓质外髓的直小血管发达 ,形成宽阔的直行血管束 ,与髓质泌尿小管束相间排列 ;内髓比外髓厚 ;肾盂背腹两侧的粘膜形成辐射状突起伸向肾锥体之间 ,并在内、外髓交界处形成穹窿状结构 ;外髓有明显的次级肾锥体出现。上述结构特征表明 ,驼肾具有强大的重吸收功能 ,有利于高浓缩尿液的产生。
Morphological and structural characteristics of kidneys in two humped camels were investigated with anatomy and histology methods, and their relations to production of high concentrated urine were discussed. The weight percent of the two kidneys in the camel to the body was about 0.6%. The ratio of thickness of the renal medulla to the cortex was 41, which indicated that Henle's loops in camel kidneys were very long. In cortex ,there were more juxtamedullary nephrons and mid cortical nephrons which have longer Henle's loops. Proximal convoluted tubules were far more longer than the distal. In the outer medullary zone, the vasa recta were grouped obviously into specific vascular bundles which alternated with the bundles of Henle's loops and collecting tubules. The inner medullary zone was thicker than the outer one. Specialized fornices were formed by projecting of either side of the pelvic and extended between renal pyramids to medullary outer zone where second pyramids clearly occurred. The characteristics above showed that kidneys in bactrian camels possessed a strong reabsorption and hence promoting the producing of high concentrated urine.
出处
《中国农业科学》
CAS
CSCD
北大核心
2002年第3期331-334,共4页
Scientia Agricultura Sinica
基金
国家自然科学基金资助项目 (3 95 0 0 10 9)
关键词
形态学
高浓缩尿
肾脏
双峰驼
水代谢
Morphology
High concentrated urine
Kidney
Bactrian camel
