第一节气管与支气管的微细构造气管与支气管的管壁可分三层,由内向外依次为粘膜层、粘膜下层和外膜(图3—1)。一、粘膜层由上皮及固有膜组成。上皮为含有杯状细胞的假覆层柱状纤毛上皮。上皮细胞游离面的纤毛可节律性的摆动,通过纤毛摆动可将粘膜表面的分泌物 The first section of the trachea and bronchial micro-structure The trachea and bronchial tube wall can be divided into three layers, from the inside out to the mucosa, submucosa and adventitia (Figure 3-1). First, the mucous layer consists of epithelial and intrinsic membrane. Epithelium is a goblet-lamellar columnar ciliated epithelium containing goblet cells. Epithelial free surface of the cilia can be rhythmic swing, the ciliary wobble can be mucosal surface secretions