DIAGRAM: GASTROINTESTINAL: GI: ARTERY: Pathogenesis of Atherosclerosis - 13 of 13; A=Thrombus, B=Connective Tissue, C=Smooth Muscle Cell, D=Complicated Lesion, E=Hemorrhage, F=Lipid, G=Calcification -- A complicated lesion may eventually form the site of thrombotic events. Thrombi are an aggregation of platelets, fibrin,