Slide 155, pharynx, H&E, 4x obj. mucosal epithelium lamina propria elastic fibers skeletal muscle muscularis externa

Slide 152, pharynx, H&E, 10x obj. mucosal epithelium lamina propria elastic fibers skeletal muscle of muscularis externa

Slide 152, pharynx, H&E, 4x obj. mucosal epithelium elastic fibers lamina propria skeletal muscle muscularis externa mucous glands

Slide 153, esophagus, H&E, 4x obj. mucosal epithelium mucosa lamina propria muscularis mucosa submucosal glands submucosa muscularis externa (smooth muscle)

Slide 153, esophagus, H&E, 10x obj. muscularis externa (smooth muscle) epithelium of mucosa lamina propria muscularis mucosa submucosal glands submucosa muscularis externa (smooth muscle)

Slide 153, esophagus, H&E, 10x obj. muscularis externa (inner circular layer of smooth muscle) myenteric plexus ganglion cells of myenteric plexus muscularis externa (outer longitudinal layer of smooth muscle) 40x obj.

transition to cardiac region Slide 155, cardio-esophageal junction transition to cardiac region esophageal region fundic region

Slide 155, esophageal region, H&E, 20x obj. stratified epithelium of mucosa muscularis mucosa muscularis externa (inner circular layer Of smooth muscle) submucosa

Slide 155, cardiac region, H&E, 20x obj. gastric pit tangential section of esophageal muscosa cardiac glands (mucous) muscularis mucosa

Slide 155, cardiac region, H&E, 40x obj. gastric pit extension of muscularis mucosa cardiac gland (mucous)

Slide 155, fundic region, H&E, 4x obj. gastric pits gastric glands

Gastric glands Slide 155, 40x obj. Slide 155, 20x obj. PC PC CC CC muscularis mucosa PC = parietal cells CC = chief cells Slide 156, 40x obj. Slide 157, 40x obj. PC CC PC CC muscularis mucosa

Slide 156, stomach, H&E, 4x obj. gastric pits parietal cells (mostly) glands mucosa chief cells (mostly) muscularis mucosa submucosa innermost oblique layer muscularis externa middle circular layer outer longitudinal layer

(PAS stains mucus purple) Slide 160, stomach, PAS, 10x obj. (PAS stains mucus purple) gastric pits gastric glands muscularis mucosa submucosa

transition to duodenum Slide 162, pylorus-duodenum junction transition to duodenum pylorus duodenum

Slide 162, pylorus, 10x obj. gastric pits muscularis mucosa pyloric glands submucosa muscularis externa

Slide 162, pylorus, 40x obj. gastric pit pyloric gland (mucous) muscularis mucosa

pyloric glands (above muscularis mucosa) Slide 162 transition to duodenum 4x obj. pyloric glands (above muscularis mucosa) submucosal (Brunner’s) glands --below muscularis mucosa pyloric mucosa duodenal mucosa

Slide 162, transition to duodenum, 10x obj. Brunner’s glands muscularis mucosa submucosal (Brunner’s) glands (mostly below muscularis mucosa but some portions extend above) duodenal mucosal epithelium

Slide 162, duodenum, 4x obj. duodenal mucosa muscularis mucosa submucosa Brunner’s glands

Slide 162, duodenum, 20x obj. duodenal epithelium lamina propria Brunner’s glands muscularis mucosa Brunner’s glands