Hematoxylin-Eosin staining of duodenum and liver tissues.

<p>a) Duodenum control group. Normal elongated villi are seen. The villous to crypt ratio is at least 3:1. b) Duodenum of <i>DAB</i>-treated rats. Blunted and discrete villi, atrophy of central lacteal, rupture of columnar epithelium and much of oligomucous cells full of viscous fluid are noted, implicating the mitotic capability was disappearing and the cells were transforming into goblet cells (H&E, 400×). c) Liver of control group. Bright field image of an H&E stained section showing normal liver architecture and components of basic liver lobules with portal area and central venule. d) Livers of <i>DAB</i>-treated group. <i>DAB</i> enlarged and congested central venules and caused a bundle of swollen sinusoids and enlarged interhepatic plate spaces and endothelial cells are distinctly noted. The cavities fully filled up with plasma after damaged implicated a state of mild inflammatory (H&E, 400×).