Figure 3From: Distribution of silver in rats following 28 days of repeated oral exposure to silver nanoparticles or silver acetate Autometallographic staining of ileum from a silver nanoparticle exposed rat. Optical micrographs of ileum section cuts showing, a) Overview and b) Detail with heavy staining in the tips of the intestinal villi (V) directly below the epithelium (E), within the lamina propria (LP), and in the submucosal region (SM).Back to article page