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机构地区:[1]北京农业大学兽医学院解剖学和组织胚胎学教研室
出 处:《解剖学报》1994年第2期196-198,T017,共4页Acta Anatomica Sinica
摘 要:对6周龄北京鸭淋巴结毛细血管后微静脉的电镜观察证明,其基本结构与哺乳动物有相似之处,但也有显著差异。毛细血管后微静脉多位于淋巴细胞聚集区(致密区),也见于淋巴组织索和结缔组织网状索内。管腔多不规则,管壁厚度不一。内皮游离面未见微绒毛。其横断面管径一般较细。管壁外周被网状细胞所环绕,管周未见巨噬细胞,内皮细胞基膜外有网状细胞及其突起、纤维和基质所环绕。可见淋巴细胞穿越管壁。The ultrastructure of the postcapillary venules(PCVs)of lymph nodes in 6 weeks old Pekin ducks was studied by electron microscopy.The venules are similar to those of the mammals,and exhibit certain structural features.The PCVs distribute mainly in the lymphoid cell masses(dense areas)and some of them are in lymph tissue cords and connective tissue reticular cords.The cross section of the vascular lumen is regular in shape,however the oblique or longitudinal section of the lumen is irregualr.The vascular wall is uneven in thickness,owing to the nucleuscontaining portion of endothelial cells is relatively thick and the rest portion is thin.The free surface of the endothelial cells no microvilli and no macrophages around the PCVs.The basal lamina of the endothelium is surrounded by reticular cells,ground substance and connective tissue fibers.The lymphocytes penetrating through the wall of PCVs were observed.
分 类 号:S852.16[农业科学—基础兽医学]
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