人胚胎主动脉内弹性膜上窗孔三维结构的扫描电镜观察  

SCANNING ELECTRON MICROSCOPIC OBSERVATION OF THREE DIMENSIONAL STRUCTURE ON FENESTRAE OF HUMAN EMBRYO AORTIC INTERNAL ELASTIC MEMBRANE

作　　者：李秀芝[1] 李庄仲[1] 李朝红 

机构地区：[1]衡阳医学院组织学胚胎学教研室

出　　处：《解剖学报》1997年第3期301-303,共3页Acta Anatomica Sinica

摘　　要：取人工流产胚胎主动脉弓标本１５例，按常规扫描电镜方法制作标本。标本按胎龄分３组，共摄片２７张。观察标本上内皮脱落处的内弹性膜，用立体学方法测量照片上的窗孔数和面积，计算出单位面积上窗孔的平均面积。结果表明：第２个月胚胎内弹性膜已出现很多小孔，第３个月小孔融合成窗孔，随胎龄增长，窗孔数增多，面积增大。单位面积上窗孔的平均面积（ｘ±ｓ）：２～３个月时为０．２０２４±０．０６３６；４～５个月时为０．２７８１±０．１１９４；６～９个月时为０．３９２９±０．０６８８。本研究提示，胚胎期间内皮下层的形成与内弹性膜窗孔面积的大小有直接关系。Fifteen samples of human fetus aortic arch from induced abortion were prepared with routine scanning electron microscopic procedures. The samples were divided into 3 groups by fetus age and altogether 27 pictures were taken of them. By observing the internal elastic membrane on the samples where endothelial cells fell off, measuring the number of fenestrae and relevant area on the pictures with stereological method, and counting fenestra area per unit area. The result is that many small pores appeared on the internal elastic membrane of 2 month old fetus, merged into fenestrae at the 3rd month and the number and area of fenestra increased with the fetus age. Fenestra area per unit area (±s) is 0.2024±0.0636 in 1st group, 0.2781±0.1149 in 2nd group and 0.3929±0.0688 in 3rd group. The result points out the direct relation between intimal thickening and fenestra area of internal elastic membrane.

关 键 词：主动脉 内弹性膜 窗孔 立体学 扫描电镜 人胚胎 

分 类 号：R321.5[医药卫生—人体解剖和组织胚胎学]