loose connective tissueareolar tissuefibroblastfibrocytemacrophagechemotaxisphagocytosisantigen presentingRERmast cellfat cellundifferentiated mesenchymal cellleukocytecollagenous fiberm 20200nm，64nmelastic fiberm reticular fiberm 64nmground substanceproteoglycanfibronectintissue fluiddense connective tissuefat tissuereticular tissueRER淋巴细胞嗜酸性粒细胞血 管基 质脂肪细胞浆细胞中性粒细 胞成纤维细胞胶原纤维弹性纤维纤维细胞肥大细胞巨噬细胞网状纤维识别因子颗粒1.识别因子包裹颗粒受体2.识别与吸附3.摄入4.吞噬体形成吞噬体初级溶酶体5.与溶酶体融合6.杀灭与消化次级溶酶体残余体过敏原 浆细胞 IgE受体肥大细胞透明质酸蛋白多糖亚单位胶原原纤维结合蛋白透明质酸核心蛋白氨基己糖多糖胶原原纤维
