High zoom imaging of the intimal layer of deionized water (solvent control) and an FeCl₃-treated example. (A) Reference imaging of the mock-treated sample showing normal endothelial cells lining the vessel lumen. (B) FeCl₃-treated femoral artery showing adherence of platelets to blackened endothelial cell layer. (C) Zoomed image showing attachment of platelets to a relaxed area of the endothelial intima layer, indicating minimal damage. (D) Zoomed imaging from FeCl₃-treated sample showing platelet adherence to endothelial layer of corrugated intima. Arrows point to thin endothelial cell continuities along the underlying elastin-rich intima.