... located near the ostial openings on the intima, thus partly occluding them 95 Systemic Pathology Exercise 23 : Blood Vessels and Lymphatics FIGURE 23 .2: A, Diagrammatic view of the histologic appearance ... FIGURE 27 .5: Chronic peptic ulcer Histologic zones of the ulcer are illustrated The mucosal surface shows necrosis, ulceration, and inflammation 1 12 Exercise 27 : GIT I Systemic...