Fn Procedure 1 Model Inventory for the Histologic Structures of the Digestive System Identify on models and diagrams the following histologic structures of the digestive system, using your textbook and this unit for reference. As you examine the models and diagrams, record the name of the model and the structures you were able to identify on the model inventory in Table 24.2 (Exercise 24-1, Procedure 1-note that this is the model inventory in Exercise 24-1). 1. Mucosa 3. Muscularis externa a. Epithelial tissue (simple columnar epithelium) a. Inner circular layer b. Muscularis mucosae b. Outer longitudinal layer c. MALT c. Inner oblique layer (stomach only) d. Glands 4. Serosa or adventitia 2. Submucosa 5. Intestinal villi a. Blood vessels a. Enterocytes b. Nerves b. Lacteal c. Lymphatic vessels c. Microvilli