Ezeasor D N, Singh A
Department of Veterinary Anatomy, University of Nigeria, Nsukka.
Am J Vet Res. 1990 Jul;51(7):1139-43.
The distribution and characteristics of lymph vessels in caprine hemal nodes were studied after glutaraldehyde fixation and epoxy resin embedding. Histologically, the lymph vessels were characterized by thin walls and wide lumens containing inspissated lymph in which a few cells were suspended. The lymph vessels contrasted sharply with adjacent blood sinuses that were filled with elements of circulating blood. A circumferential lymph vessel in the cortex joined radial branches in the medulla that met at the hilum to drain through a large efferent lymph channel. Ultrastructurally, the lymph vessel wall comprised endothelial cells supported by a continuous basal lamina, collagen fibrils, and adventitial reticular cells. The cytoplasm of endothelial cells had fenestrations, plasmalemma-associated vesicles, vacuoles, and focal splits that enclosed large compartments. Many compartments contained erythrocytes and lymphocytes. Modifications of the endothelial cells signified their endowment with features that favored transendothelial transport. The distribution of lymph vessels and the finding of only efferent lymph channels are related to the roles of hemal nodes in blood storage by hemoconcentration and in immune defense mechanisms.
在戊二醛固定和环氧树脂包埋后，研究了山羊血淋巴结中淋巴管的分布和特征。组织学上，淋巴管的特征是壁薄且管腔宽，管腔内含有浓缩的淋巴液，其中悬浮着一些细胞。淋巴管与充满循环血液成分的相邻血窦形成鲜明对比。皮质中的一条环形淋巴管与髓质中的放射状分支相连，这些分支在 hilum 处汇合，通过一条大的输出淋巴管引流。超微结构上，淋巴管壁由内皮细胞组成，内皮细胞由连续的基膜、胶原纤维和外膜网状细胞支撑。内皮细胞的细胞质有窗孔、质膜相关小泡、液泡和包围大腔室的局灶性分裂。许多腔室含有红细胞和淋巴细胞。内皮细胞的修饰表明它们具有有利于跨内皮运输的特征。淋巴管的分布以及仅发现输出淋巴管与血淋巴结在血液浓缩中的血液储存和免疫防御机制中的作用有关。
