Helicobacter Peptic ulcer disease Helicobacter pylori 1um Mucus layer Ammonia from activity of bacterial urease neutralizes Hydrochloric acid hydrochloric acld Mucus-secreting epithelial cells lining stomach Blood capillary● Connective tissue (cross section) Lymphocyte Submucosal cell -Neutrophil -Plasma cell Figure 25.13Helicobacter Peptic ulcer disease Figure 25.13