Slide #130 (human) - methacrylate.   The lining epithelium is particularly well preserved.   Notice goblet cells, absorptive columnar cells with striated border (brush border, microvilli), terminal bars (junctional complexes).   In the lamina propria of the many lymphocytes, both in the lamina propria and passing through the lining epithelium.   There are probably no Paneth cells visible in your section.