摘要
目的:研究兔眼睫状体的超微结构特征,并探讨其功能。方法:采用扫描和透射电子镜观察兔眼睫状体。结果:睫状突的游离面隆起呈袢状,上皮细胞游离面具有大量粗而短的微绒毛及散在的微顶浆分泌小泡。睫状环游离面也存在纵行的微嵴,该处上皮细胞表面的微绒毛及分泌泡数量均较睫状突上皮者少。睫状上皮由两层立方形上皮细胞构成。表层(即腔面)为非色素细胞,内含丰富的细胞器,面向后房的细胞质膜呈高度褶叠,并可见微绒毛及分泌泡;深层的色素上皮细胞面向睫状体基质面的细胞质膜也有褶叠。睫状体基质的疏松结缔组织内可见大量有窗孔的毛细血管。结论:睫状体与房水的选择性通透分泌有关,构成“血——房水屏障”。
Objective :To study the ultrastructural characteristics and the functions of ciliary body in rabbits. Methods : Scanning and transmission electron microscopy were used. Results :The free face of ciliary processes upheaved like ansa. Many coarse and short microvilli and dispersed rnicroapocrinal vesicles were observed on the free surface of the epithelium. The free face of ciliary ring also had longitudinal cristae, and on the surface of its epithelium less microvilli and secretory vesicles were observed. The epithelia of ciliary body were double cubical epithelia. The superficial layer was non-pigment -ed epithelial cell, in which organelles were abundant. The cell membrane facing posterior chamber was highly folded and microvilli and secretory visecles could be seen. The deeper layer was pigmented epithelial cell,and its plasmalemina of stro-ma face was also folded. In the loose connective tissue of ciliary stroma many fenestrated capillaries were observed. Conclusion :Ciliary body is the selective permeability site of aqueous humor secretion, forming blood-aqueous humor barrier.
出处
《解剖学杂志》
CAS
CSCD
北大核心
2003年第6期559-563,共5页
Chinese Journal of Anatomy
