There are a lot of secretory granule in goblet cell and mucous glandular cell, and there are many lymphocytic cells, neutrophilic granulocyte and a small quantity of eosinophilic granulocytes.

• 上皮纤毛发达，线粒体丰富，内质网、高尔基氏体发达，黏液性腺细胞和杯状细胞浆中有大量黏液分泌颗粒，基底膜下有大量淋巴细胞、中性粒细胞及少量嗜酸性粒细胞浸润。