Slide DMS131 (Monkey; duodenum). You are looking at a plastic thin section stained by an H&E method. The quality of preservation and staining of this tissue makes it excellent for studying cytological detail. Look for the same duodendal features as described above. In addition, use high power to study in detail the features of the villi. If you have never really seen microvillous brush borders, terminal bars and webs, now is your chance. Also look at the contents of the lamina propria core of the villi and intestinal glands. Note the many plasma cells, lymphocytes, occasional mast cells, etc. All show up remarkably well.