气管的器官内淋巴管

本文应用淋巴管间接注射法以及光镜和电镜观察的方法,对家兔气管的器官内淋巴管进行了研究。在气管粘膜层仅见到毛细淋巴管,彼此吻合成网。气管与喉的粘膜层毛细淋巴管存在吻合,但数量较少。在气管粘膜下层、肌层及外膜层则见到毛细淋巴管和淋巴管。气管毛细淋巴管的超微结构可见,管壁厚薄不均,内皮的多数细胞核向管腔内突出,基膜不完整,无孔窗,无周细胞,壁外有大量纤维束伴行。内皮间连接较复杂,归纳可分为端端连接、重叠连接和嵌合连接。内皮间连接处有粘着装置(如粘着带、粘着斑或桥粒),但较薄弱,有的连接呈开放状态(>30nm)。毛细淋巴管内皮的胞浆内有大量囊泡,其分布无一定规律,有的囊泡与内皮细胞质膜融合或呈开放状态,形成质膜内陷。囊泡形态大小不等,有的体积较大且内部充满颗粒状不均匀物质,有的囊泡外包有电子密度较高的外衣,有些则不明显。

THE INTRINSIC LYMPH VESSELS OF TRACHEA IN THE RABBIT

The intrinsic lymph vessels of trachea were examined by light and electron microscopy in rabbit trachea. The tracheal mucosal layers were provided with lymphatic capillary networks, but larger lymphatics were not found. There were scanty capillary networks in the mucosal layers the junction between the trachea and larynx. Both capillary and the collecting vessels were found in the submucosal, the muscular and the adventitia tunics. The lymphatics observed by electron microscopy in this study were structurally similar to lymphatic lymphatics seen elsewhere in the body. The nonfenestrated endothelium was thin and lacked a continuous basal lamina, collagen and reticular fibers were intimately associated with the abluminal surface. The endothelial cells were joined to each other by three types of intercellular junctions end-to-end, overlapping, and interdigitating, Only two open junction (>30nm) was seen in 63 intercellular junctions examined, fasciae occludents or fasciae adherenes were seen in 92% of the endothelial junctions. There were large vesicles distributed in the endothelial cytoplasmic. Some vesicles opening onto the luminal or the abluminal surface endothelium. Uncoated vesicles and coated vesicles were found within the cytoplasm.a. Some large vesiculated body filled by a gyanular, inhomeneous material.