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BIO 241 HISTOLOGY REVIEW Digestive System

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Department of Biology and Marine Biology. Basic histological plan of ... lobule. lobule. lobule. Pancreas -- acinus. interlobular duct. connective tissue. acini ... – PowerPoint PPT presentation

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Title: BIO 241 HISTOLOGY REVIEW Digestive System


1
BIO 241 HISTOLOGY REVIEWDigestive System
Dr. Tim Ballard Department of Biology and Marine
Biology
2
Basic histological plan of the GI tract
3
Esophagus
Arrow epithelium of trachea M mucosa SB
submucosa ME muscularis externa A adventitia
4
Esophagus
Arrow epithelium ME muscularis externa
Arrowheads Blood vessels in the submucosa
5
Esophagus
stratified squamous epithelium
mucous gland
Arrow duct of mucous secreting gland in the
submucosa
6
Esophagus
adventitia
muscularis externa
outer longitudinal
inner circular
stratified squamous epithelium
submucosa
7
Stomach
8
Fundic Stomach
Arrowhead muscularis mucosae Arrow
muscularis externa
9
Typical gastric gland
parietal cells
chief cells
Arrowhead neck mucous cells
10
Stomach wall
parietal cells
chief cells
submucosa
Arrow muscularis mucosae ME
muscularis externa
11
Pyloric stomach
Arrow gastric glands Arrowheads lymphocytes
12
Duodenum
intestinal gland
muscularis externa
Curved Arrow villus Arrow Brunners gland
Arrowhead lymphatic tissue
13
Ileum
V villi S submucosa PC plica circularis
M mucularis mucosa arrowheads intestinal
glands
14
Ileum
villus
Arrow Peyers patches Arrowhead
mesentery
15
Colon
no villi
mucosa
muscularis
submucosa
Arrow smooth muscle of taenia coli
16
Colon
goblet cells
simple columnar cells
17
Liver
lobule
portal triad
Arrowhead capsule Arrows interstitial c.t.
Curved arrow central vein
18
Liver portal triad
simple cuboidal epithelium
A Hepatic artery B Portal vein C bile duct
19
Liver hepatocytes and sinusoids
Look for sinusoids as the spaces between cords of
hepatocytes
A central vein B Portal tract
20
Liver bile canaliculi
Look for canaliculi between adjacent rows of
hepatocytes
sinusoid
Arrowhead endothelium of central vein
21
Pancreas -- lobules
lobule
lobule
lobule
lobule
Arrow Islets of Langerhans Arrowhead septa
22
Pancreas -- acinus
connective tissue
interlobular duct
acini
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