Figure 2: H&E-Stained Image and SEM Image of Sinus of a Native Aortic Valve

(A) In hematoxylin and eosin (H&E) staining, nuclei are seen as blue/purple. Collagen fibrils are seen as pale pink. Scale: 5 μm. (B) Collagen fibrils were aligned and dense as shown in the scanning electron microscopy (SEM) image. Scale = 8 μm.