Activity 3: Observing the Histologic Structure of the Small Intestine

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1

The Duodenum

The Duodenum

2

What are the 4 basic tunics or layers of the duodenum from innermost to outermost?

1. Mucosa

2. Submucosa

3. Muscularis externa

4. Serosa

3

The serosa is also called what type of peritoneum?

Visceral peritoneum

4

The duodenal glands in the duodenum of the small intestine produces what?

Mucus

5

What type of epithelium do you see in the duodenum of the small intestine?

Simple columnar epithelium

6

What is the function of the villi in the duodenum of the small intestine?

Increase the surface area for absorption

7

Goblet cells may be found in the epithelium of villi of what 2 alimentary canal organs?

1. Small intestine

2. Large intestine

8

What is the function of goblet cells?

To produce mucus

9

The intestinal crypts contain cells that produce what?

Intestinal juice

10

The intestinal juice produced by the intestinal crypts serves what purpose?

Acts as a carrier fluid for absorption of nutrients from the chyme

11

The Ileum

The Ileum

12

The ileum looks like the duodenum, but why are the villi less elaborate?

Most of the absorption has occurred by the time that the chyme reaches the ileum

13

What type of nodules are found in the ileum?

Aggregated lymphoid nodules aka Peyer's patches

14

What tissue type are aggregated lymphoid nodules?

Lymphatic tissue

15
card image

1. Identify the blanks.

2. What feature of the alimentary canal is shown in this histology slide? (Hint: What specific region of the organ?)

card image

1. Look at the picture.

2. Duodenum of small intestine

16
card image

1. Identify the blanks.

2. What feature of the alimentary canal is shown in this histology slide? (Hint: What specific region of the organ?)

card image

1. Look at the picture.

2. Duodenum of small intestine

17
card image

1. Identify the blanks.

2. What feature of the alimentary canal is shown in this histology slide? (Hint: What specific region of the organ?)

card image

1. Look at the picture.

2. Jejunum of small intestine

18
card image

1. Identify the blanks.

2. What feature of the alimentary canal is shown in this histology slide? (Hint: What specific region of the organ?)

card image

1. Look at the picture.

2. Ileum of small intestine

19
card image

1. Identify the blanks.

2. What feature of the alimentary canal is shown in this histology slide? (Hint: What specific region of the organ?)

card image

1. Look at the picture.

2. Ileum of small intestine