Cell cement Epithelial Exoenzymes cell Bacteria 产生胞外酶,松散 ooo:○ 胞间连接,扩散 Bacteria Toxins Exotoxins Epithelial cells 产生毒素,扩散到靶细胞 Nucleus Figure 13.12 The function of exoenzymes, toxins, and phagocyte blockers in invasiveness.(a) Exoenzymes Bacteria produce extracellular enzymes that dissolve extracellular barriers and penetrate through or between cells to underlying tissues. (b) Toxins(primarily 2021/10/18 exotoxins) secreted by bacteria diffuse to target cells, which are 23 poisoned and disrupted. (o Blocked(top) or incomplete(bottom)23 2021/10/18 产生毒素，扩散到靶细胞 产生胞外酶，松散 胞间连接，扩散