Digestive_Sysem

	DIGESTIVE SYSTEM HISTOLOGY David B. Fankhauser, Ph.D. Professor of Biology and Chemistry U.C. Clermont College Batavia OH 45103
duodenum, 40x	This page has been accessed times since 30 April 2002. 1 May 1990, rvsd 6 May 93, 28 Mar'95, 1 April 97, 29 Mar 98, 28 Mar 00, 26 April 01	colon, 40x

Examine the following slides, illustrate and label the indicated features: (See diFiore's Atlas, 9^th Ed, referenced below as VE.)

Stomach, combination, H2890. VE: p. 187, 193. 100x:
examine cells from the body region of the stomach (here is stomach at 40x )
simple mucous columnar epithelium
gastric pits
parietal cells (synthesize HCl, along wall )
chief cells (synthesize pepsinogen, deep)
lamina propria
muscularis mucosa

Here is a labeled view of the gastric mucosa .

Slide: Duodenum, jejunum, ileum, H 3008
(These next three are on the same slide and should be drawn on a single page to contrast their distinguishing features. The distinguishing features are italicized in the following lists of features)
The image to the left is duodenum

Here is a collage showing the duodenum, jejunum and ileum with diagnostic features noted.

duodenum: VE: p. 201, 40x
[intestinal villus] (May not be apparent)
simple columnar (striated border = microvilli)
goblet cells
intestinal glands (Crypts of Lieberkühn)
duodenal glands (Brunner's, deeper, make mucus)
muscularis externa
serosa

Here is a labeled view of the duodenum .

jejunum: VE: p. 203. 40x:
mucosa
submucosa (no Brunner's or Peyer's)
intestinal glands
muscularis externa
serosa

ileum, VE: p. 205, 40x:
mucosa
submucosa
Peyer's patches (lymphatic tissue in submucosa)
intestinal glands
muscularis externa
serosa

Here is a labeled view of the ileum .

Large intestine, c.s., H 3010 VE: pp 207 & 209, 100x
mucosa (flat luminal surface)
goblet cells
submucosa
lymph nodes (if present)
muscularis externa
serosa

Here is a labeled view of the colon .

Liver overview, h.&e., 98-9600 VE: p. 221, 40x
liver lobule surrounded by several triads
central vein (here is a close up of a central vein .)
hepatic triad

Here is a labeled 100x view of a liver lobule.
Here is a labeled 400x view of the central vein, sinusoids, hepatocytes and Kupfer cells.

Liver detail, VE: p. 223, 100 or 400x: Here is a good view of a liver lobule, 100x.
hepatic triad:
bile duct (Simple cuboid epithelium
hepatic artery
hepatic portal vein
sinusoids
plates of hepatocytes (columns)
Also possess Kupfer cells (Part of reticuloendothelial system)
central vein

Here is a labeled view of a hepatic triad.

	Stomach, combination, H2890. VE: p. 187, 193. 100x: examine cells from the body region of the stomach (here is stomach at 40x ) simple mucous columnar epithelium gastric pits parietal cells (synthesize HCl, along wall ) chief cells (synthesize pepsinogen, deep) lamina propria muscularis mucosa Here is a labeled view of the gastric mucosa .
	Slide: Duodenum, jejunum, ileum, H 3008 (These next three are on the same slide and should be drawn on a single page to contrast their distinguishing features. The distinguishing features are italicized in the following lists of features) The image to the left is duodenum Here is a collage showing the duodenum, jejunum and ileum with diagnostic features noted.
	duodenum: VE: p. 201, 40x [intestinal villus] (May not be apparent) simple columnar (striated border = microvilli) goblet cells intestinal glands (Crypts of Lieberkühn) duodenal glands (Brunner's, deeper, make mucus) muscularis externa serosa Here is a labeled view of the duodenum .
	jejunum: VE: p. 203. 40x: mucosa submucosa (no Brunner's or Peyer's) intestinal glands muscularis externa serosa
	ileum, VE: p. 205, 40x: mucosa submucosa Peyer's patches (lymphatic tissue in submucosa) intestinal glands muscularis externa serosa Here is a labeled view of the ileum .
	Large intestine, c.s., H 3010 VE: pp 207 & 209, 100x mucosa (flat luminal surface) goblet cells submucosa lymph nodes (if present) muscularis externa serosa Here is a labeled view of the colon .
	Liver overview, h.&e., 98-9600 VE: p. 221, 40x liver lobule surrounded by several triads central vein (here is a close up of a central vein .) hepatic triad Here is a labeled 100x view of a liver lobule. Here is a labeled 400x view of the central vein, sinusoids, hepatocytes and Kupfer cells.
	Liver detail, VE: p. 223, 100 or 400x: Here is a good view of a liver lobule, 100x. hepatic triad: bile duct (Simple cuboid epithelium hepatic artery hepatic portal vein sinusoids plates of hepatocytes (columns) Also possess Kupfer cells (Part of reticuloendothelial system) central vein Here is a labeled view of a hepatic triad.

DIGESTIVE SYSTEM