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用电镜和锇酸－二甲基亚砜－锇酸（ＯｓＯ_４－ＤＭＳＯ－ＯｓＯ_４，ＯＤＯ）冷冻断裂技术观察了人体腹膜孔淋巴引流单位的超微结构。淋巴引流单位位于腹膜孔内，由３种结构组成，即立方形间皮细胞、淋巴陷窝内皮细胞和两者之间的结缔组织。上述３种结构相互并置，但其间无特殊的连接结构。立方形间皮细胞常伸出瓣膜状胞质突起，使腹膜下小管呈蜿蜒曲折状。间皮下结缔组织中成纤维细胞的胞质突起可与淋巴陷窝内皮细胞相贴，而结缔组织的纤维层则横跨腹膜孔，形成腹膜孔的底和淋巴陷窝的顶。在这些纤维层中，纤维相互交织构成一个三维的结缔组织网。通过结缔组织网孔，使立方形间皮细胞与淋巴陷窝的内皮细胞相连，形成腹膜下小管。借助于腹膜下小管，腹膜腔与淋巴陷窝相通。腹膜孔淋巴引流单位位于腹膜腔物质吸收的必经之处，对物质的吸收起调节作用。
The ultrastructure of human peritoneal lymphatic drainage units was observed by electron microscopy and cryogenic fracture technique with osmium tetroxide - dimethyl sulfoxide - osmium acid (OsO_4-DMSO-OsO_4, ODO). Lymphatic drainage unit located in the peritoneal cavity, composed of three kinds of structures, namely, cubic mesothelial cells, lymph node endothelial cells and the connective tissue between the two. The above three kinds of structures are juxtaposed with each other, but there is no special connecting structure between them. Cubic mesothelial cells often protruding valve-like cytoplasmic processes, so that the peritubular tubules were meandering. Subcytoplasmic connective tissue in the cytoplasm of fibroblasts and lymphatic endothelial cells can be attached to the lacunar endothelial cells, while the connective tissue of the fibrous layer traverses the peritoneal cavity to form the bottom of the peritoneal cavity and the top of the lymph lacuna. In these fiber layers, the fibers interweave to form a three-dimensional connective tissue network. Through the connective tissue mesh, so that the cubic mesothelial cells and lymphatic endothelial cells connected to form a peritubular tubule. By means of the peritoneal tubules, the peritoneal cavity communicates with the lymphatic lacunae. Peritoneal cavity lymphatic drainage unit located in the peritoneal cavity absorption of the necessary material, the absorption of substances play a regulatory role.