Esophagus, stomach, duodenum and

pancreas

János Barna

Laimer’sdiverticulum

Laimer’s triangle

(cricopharyngealconstriction)

(diaphragmaticconstriction)

(aortic constriction)

(bronchial constriction25-27cm)

cricopharyngeal constriction

diaphragmatic constriction

aortic constriction

bronchial constriction

angle of His

.

Tunica muscularis with smooth muscle and visceral striated muscle

myenteric plexus of Auerbachwith ganglion cells

Tunica muscularis with smooth muscle

myenteric plexus of Auerbach

Esophago-gastric junction

Esophago-gastric junction

Tunica mucosa with fundus glands

parietal cell

mucous neck cell

chief cell

Esophago-gastric junction

Pyloric sphincter muscle

Brunner’s glands

Pyloric glands

Intestinal villi

Crypts of Lieberkühn

goblet cell

Paneth cell

enterocyte

Figure 24.3 The Structure of theDigestive Tract

Figure 24.3

crypt of Lieberkühn (intestinal gland)

Brush border

Tunica mucosaTela submucosaTunica muscularisTela subserosaTunica serosa

Tunica mucosaTela submucosa

undifferentiated cell

goblet cell

Paneth cell

enterocytes

goblet cell(alcian-blue)

Brunner’s glands(picrosirius red)

intercalated duct

interlobular ducts

centroacinar cell

centroacinar cell