要想了解慢性支气管炎的咯痰情况,就要先知道正常支气管的结构。支气管粘膜由两种上皮构成,即纤毛柱状上皮和杯状细胞。杯状细胞能分泌粘液,可保持气管的湿润和把吸入的异物、细菌等粘着,然后借助于纤毛柱状上皮的纤毛摆动,将吸入的异物排出体外。患慢性支气管炎时,长期反复的炎症刺激,可使杯状细胞代偿性 To understand the expectoration of chronic bronchitis, we must first know the structure of the normal bronchus. The bronchial mucosa is composed of two types of epithelium, ciliated columnar epithelium and goblet cells. Goblet cells can secrete mucus, can keep the trachea moist and the inhalation of foreign bodies, bacteria and other adhesion, and then by means of the ciliated columnar epithelial ciliary wobble, the inhalation of foreign body excreted. Chronic bronchitis, the long-term repeated inflammatory stimuli, goblet cells can compensatory