Fig. (3) H&E staining. Normal menisci (horizontal sections of the central portion of menisci) displayed well organized and compact collagen bundles with meniscal cells lining up between the bundles. In contrast, OA menisci (horizontal sections of the central portion of menisci) displayed less well-organized and less compact collagen networks. In some areas, the meniscal cells were randomly distributed. Scale bar: 200 µm.