Download 24. Digestive Histology

The General Plan
a) Epithelium
a) Circular
Muscle
a) Longitudinal
Muscle
MA = tunica mucosa
SU = tela submucosa
b) Lamina
Propria
c) Muscularis Mucosae
MU = tunica muscularis externa
S = tunica serosa
Esophagus
tunica mucosa
tela submucosa
tunica
musularis exrterna
tunica adventitia
Gastro-Esophageal Junction
Stomach (fundus region)
1. Translucent convoluted areas
are gastric pits in tunica
mucosa
2. below are “fundic” gastric
glands in tunica mucosa
Stomach (Pylorus)
Duodenum
Duodenal glands
Small Intestine, Duodenum
Pointer is on doudenal (Brunner’s) glands in the tela submucosa
the layer (tunica) above is just the general view of the tunica mucosa
with intestinal glands
Brunners gland
• Small Intestine, Duodenum (100x).
• Pointer shows Duodenal (Brunner's) glands in the tela
submucosa, their ducts pass through the muscularis mucosa
Small Intestine, Ileum
Payer’s patch
Large Intestine, Colon
Mucus gland
• Pointer - Mucus glands with many goblet cells.
Liver (lobule)
•
•
•
Central vein of the Liver, (central pointer)
Hepatocytes (everything around it, dark staining)
Sinusoid (capillaries)
The Central Vein (drain)
Pointer at Lumen of central Vein
2.
3.
1.
1. Pointer is in the lumen of a branch of hepatic portal vein
2. Pointer is on a branch of the hepatic artery
3. Pointer is on a bile duct (simple cuboidal epithelium)
Hepatocytes (cells) = dark staining all around w/ nucleus
3 Friends!
The Pancreas
Pancreatic acini
Pancreatic islets
The Pancreas
• Pointers show pancreatic islets
• Everything else around are pancreatic acini
Gorgeous!
Trachea
tunica mucosa
tela submucosa
hyaline cartilage
Pseudostratified Ciliated Columnar Epithelium
(with goblet cells) at blue pointer.
Trachea
1)
2)
3)
1) pseudostratified ciliated columnar epi
2) tracheal cartilage ring
3) trachealis muscle
Liver, Portal Area
• Branch of hepatic portal vein (Biggest Lumen)
• Bile duct (smallest circle, top pointer)
• Hepatic artery (thick walled)