This document provides a summary of histology slides of various structures in the digestive system. It contains slides of the liver, pancreas, salivary glands, esophagus, stomach, duodenum, jejunum, ileum, and colon along with questions to test the identification of key structures like hepatic lobules, pancreatic islets, gastric glands, villi, and muscular layers. The goal is to prepare the reader to identify all structures on the anatomy lab list using micrographs as examples.

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. What organ is this?
What structure is in the circle?
Liver
Hepatic Lobule
Copyright Lutz Slomianka 1998-2006

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. Copyright Lutz Slomianka 1998-2006

5. Copyright Lutz Slomianka 1998-2006
The circled group of structures are called a_____
Name the specific structures in this group.
Hepatic triad

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. 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. 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. Copyright Lutz Slomianka 1998-2006

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. 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. 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. Copyright Lutz Slomianka 1998-2006
Name this organ and all structures that you
are familiar with

15. 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.

16. 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

17. 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

18. 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)

19. These two micrographs are from
Colon
Label the indicated structures
Mucosa
Submucosa
Circular Muscle
Longitudinal Muscle (Tenia coli)
Label this structure:
Peyers Patch

20. Stomach Jejunum/ileum
Name the organs that each of these are taken from
Goblet cells
Name the indicated cells
Duodonem Colon

21. Esophogeal-gastric junction
Gastric Pit
Nonkeratinized
Stratified squamous
epithelium
Gastric Gland
The beginning and the end of the GI tract
look fairly similar!