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Digestive System Histology

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Histology of the digestive system

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Digestive System Histology

  1. 1. Histology of the Digestive System  This presentation will prepare you to identify all of the structures on the anatomy lab list.  Micrographs in this presentation were obtained from various sources which are indicated on each slide.  This presentation was created by Arleen Sawitzke
  2. 2. What organ is this? What structure is in the circle? Liver Hepatic Lobule Copyright Lutz Slomianka 1998-2006
  3. 3. Copyright Lutz Slomianka 1998-2006 Name as many structures as possible on this slide. You should be able to name 3. This slide is from the _____
  4. 4. Copyright Lutz Slomianka 1998-2006
  5. 5. Copyright Lutz Slomianka 1998-2006 The circled group of structures are called a_____ Name the specific structures in this group. Hepatic triad
  6. 6. Notice that the lumen of the vein is Larger than that of the artery. Both Vessels are lined with simple Squamous epithelium. The arteriole Has a small amount of smooth Muscle around it. The bile duct is Lined with simple cuboidal epithelium Copyright Lutz Slomianka 1998-2006
  7. 7. Copyright Lutz Slomianka 1998-2006 Pan20he Name the organ from which this is taken What is the circled structure called? What are the cells indicated by the arrow? Pancreas Pancreatic islet Acinar cells
  8. 8. Copyright Addison Wesley Longman 1998 These two slides represent what structures in the digestive system? Salivary glands—the sublingual and the submaxillary. Notice the duct in the first figure
  9. 9. Copyright Lutz Slomianka 1998-2006
  10. 10. A B A. Pancreas (notice islet), B. Liver (notice central vein and sinusoids) C. Salivary gland (notice ducts and no islets) Name the organ that each of these is taken from C
  11. 11. Name the organ. Name the indicated structures Esophagus Longitudinal muscle Copyright Lutz Slomianka 1998-2006 Muscularis mucosa Stratified Squamous Epithelium Mucosa Submucosal gland Circular muscle Submucosa Lamina Propria Muscularis
  12. 12. Copyright Lutz Slomianka 1998-2006 Rugae Serosa Gastric Pit Gastric Gland Lamina Propria Name this organ Stomach Can you see the mucosa, submucosa, and muscularis? Name the indicated structures Submucosa
  13. 13. Copyright Lutz Slomianka 1998-2006 Name this organ and all structures that you are familiar with
  14. 14. The jejunum has several differences from the duodenum. Compare this slide with the previous slide. 1. There are few or no submucosal glands 2. The submucosa is folded into plicae circulari (circular folds) 3. The mucosal glands (crypts of Lieberkuhn) are much less prominent in the jejunum. Both the duodenum and the jejunum have villi to increase surface area.
  15. 15. 1 2 3 4 This slide is from the ______. Name the four indicated layers. Jejunem Serosa, Longitudinal muscle,Circular Muscle, Submucosa The circled structure is a The structure in the rectangle is a Villus Circular Fold
  16. 16. Copyright Lutz Slomianka 1998-2006 This slide is from the ___. The structures that indicate that that this is the ileum are the __ Not all of the regions of the ileum have this many Peyers patches Label the indicated structures Ileum Peyers Patches Villi Peyers Patch Muscularis externa Serosa
  17. 17. Indicate which organ each of these micrographs is from A B C A=duodenum (notice submucosal glands) B=ileum (notice peyers patchs) C=jejunum or ileum (notice circular folds)
  18. 18. These two micrographs are from Colon Label the indicated structures Mucosa Submucosa Circular Muscle Longitudinal Muscle (Tenia coli) Label this structure: Peyers Patch
  19. 19. Stomach Jejunum/ileum Name the organs that each of these are taken from Goblet cells Name the indicated cells Duodonem Colon
  20. 20. Esophogeal-gastric junction Gastric Pit Nonkeratinized Stratified squamous epithelium Gastric Gland The beginning and the end of the GI tract look fairly similar!

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