Figure 6.

Representative photographs of the microscopic changes from the five groups stained with Verhoeff's elastic stain with magnification 10 and 20x. Note: (i) the normal arterial wall structure in Group I; (ii) the moderate to sever atherosclerosis in Group III that involves a large portion of the aortic circumference; (iii) severe atherosclerosis in Group IV and the smooth muscle cells proliferation in the intima; (iv) also note the very small atheroma in Group V and the absence of smooth muscle cells proliferation in the intima. Mild ≤ 30%, moderate = 30–60%, severe ≥ 60%.