云南树鼩肝脏结构的光、电镜观察

LIGHT AND ELECTRON MICROSCOPE OBSERVATION ON LUNG STRUCTURE OF IN YUNNAN TREE SHREW

本文报告了树肺脏的一般结构和超微结构。与人和灵长目相似，其肺实质也是由导气部和呼吸部构成。但不同的是其细支气管粘膜形成很高的皱襞。在电镜下Ｃｌａｒａ细胞电子密度高，顶部胞质中含有大量膜包颗粒，这些结构与大白鼠和家兔的结构相似。许多毛细血管外方都包绕着基膜和肺泡Ⅰ型上皮细胞的胞质。气血屏障由肺泡上皮细胞、融合的基膜和内皮细胞胞质构成。说明树肺脏不但是呼吸器官，也是一些激素和介质产生及代谢的重要器官。本文为研究树的正常生理功能及分类提供形态学资料。

We studied the general structure and ultastructure of lungs in tree shrew.The parenchyma of the lungs was composed of conducting portion and respiratory portion, whice was similar to those in primate and human. The Clara cell was electron dense under the E. M and contained a large quantity of secretory granules in the apical cytoplasm. The capillaries weve surrounded by basement membrane and type I alveolar cells. The air-blood barrier was composed of type I alveolar cell with fused basement membrane and the endothelial cell of capillary.