肾小球的扫描电子显微镜观察

我们对6只狗的左、右肾进行了扫描电镜观察,结果表明肾小球的外部构筑,可分为球型、菊花型和混合型。在有的肾小球的入球小动脉和出球小动脉之间,或邻近的两出球小动脉之间,有长短不一、粗细不等的血管吻合支存在。在肾小球的血管极处,即肾小球旁器所在部,非血管成分被腐蚀,但清楚地显示出肾小球旁器内毛细血管网的立体构型,表现为管径粗、网孔小、网眼密和血管分布近似三角形。这种构型特点,与该部位血流速率快、流量大有密切关系。

OBSERVATION OF THE RENAL GLOMERULUS BY SCANNING ELECTRON MICROSCOPE

The kidneys removed from six female adult dogs were injected through the renal artery with ABS at a constant pressure between 250～280 mmHg. Small specimens cut out from the kindneys were digested in 3% trypsin solution and eroded in 50% HCI. The cast specimens were studied under the scanning electron microscope, The results were outlined as follows: 1. The corrosion-cast models of the renal glomerulus of the dogs observed under the SEM could be divided into three kinds: the spherical glomerulus, the chrysanthemum-like glomerulus and mixed glomerulus. 2. In general, the afferent and efferent arteriolae entered or exited at the hilum of glomerulus. Rarely, the efferent vessel left the glomerulus at the opposite side of the hilum. Anastomoses between the afferent and efferent or between the efferent and efferent vessels were found in our casts. 3. The capillary network of the juxtaglomerular apparatus was observed at the hilum of glomerulus in our casts. The meshes of the capillary network were smaller than the diameters of the vessels themselves.