Figure 7 Analyses of penis tissue in rats using hematoxylin and eosin (HE) staining. The penis tissue of rats was stained with HE to observe pathologic changes in the penis under electron microscopy (n=6 animals per group). In group A: (i) the blood sinuses are abundant and neatly arranged (arrows ➀ ➁); (ii) tissue gap is small (arrows ➃); (iii) nucleus is abundant (arrows ➅). In group B: (i) the blood sinuses are significantly reduced (arrows ➂); (ii) smooth muscle fibers are disorderly arranged and tissue gaps increase (arrows ➄); (iii) the nucleus is reduced (arrows ➆).