Slide 155, pharynx, H&E, 4x obj.Slide 155, pharynx, H&E, 4x obj.

mucosal epitheliummucosal epithelium

laminalaminapropriapropria

elastic fiberselastic fibers

skeletal muscleskeletal muscle

muscularis externamuscularis externa

mucosal epitheliummucosal epithelium

laminalaminapropriapropria

elastic fiberselastic fibers

skeletal muscle of muscularis externaskeletal muscle of muscularis externa

Slide 152, pharynx, H&E, 10x obj.Slide 152, pharynx, H&E, 10x obj.

Slide 152, pharynx, H&E, 4x obj.Slide 152, pharynx, H&E, 4x obj.

mucosal epitheliummucosal epithelium

laminalaminapropriapropria

elastic fiberselastic fibers

skeletal muscleskeletal muscle

muscularis externamuscularis externa

mucous glandsmucous glands

Slide 153, esophagus, H&E, 4x obj.Slide 153, esophagus, H&E, 4x obj.

mucosamucosa

laminalaminapropriapropria

submucosasubmucosa

muscularis externamuscularis externa(smooth muscle)(smooth muscle)

submucosal glandssubmucosal glands

muscularis mucosamuscularis mucosa

mucosal epitheliummucosal epithelium

epithelium of mucosaepithelium of mucosa

laminalaminapropriapropria

submucosasubmucosasubmucosal glandssubmucosal glands

muscularis mucosamuscularis mucosa

muscularis externa (smooth muscle)muscularis externa (smooth muscle)

Slide 153, esophagus, H&E, 10x obj.Slide 153, esophagus, H&E, 10x obj.

Slide 153, esophagus, H&E, 10x obj.Slide 153, esophagus, H&E, 10x obj.

40x obj.40x obj.

muscularis externa muscularis externa (inner circular layer (inner circular layer of smooth muscle)of smooth muscle)

muscularis externa muscularis externa (outer longitudinal layer (outer longitudinal layer

of smooth muscle)of smooth muscle)

myenteric plexusmyenteric plexus

ganglion cells of myenteric plexusganglion cells of myenteric plexus

Slide 155, cardio-esophageal junction Slide 155, cardio-esophageal junction

esophageal regionesophageal region

transition to cardiac regiontransition to cardiac region

fundic regionfundic region

Slide 155, esophageal region, H&E, 20x obj. Slide 155, esophageal region, H&E, 20x obj.

stratified epithelium of mucosastratified epithelium of mucosa

muscularis mucosa

muscularis mucosa

submucosa

submucosa muscularis externamuscularis externa(inner circular layer(inner circular layerOf smooth muscle)Of smooth muscle)

Slide 155, cardiac region, H&E, 20x obj. Slide 155, cardiac region, H&E, 20x obj.

tangential tangential section of section of

esophageal esophageal muscosamuscosa

gas

tric

pit

gas

tric

pit

cardiac glands (mucous)

cardiac glands (mucous)

muscularis mucosa

muscularis mucosa

Slide 155, cardiac region, H&E, 40x obj. Slide 155, cardiac region, H&E, 40x obj.

gastric pitgastric pit

cardiac gland cardiac gland (mucous)(mucous)

exte

nsi

on

of

mu

scu

lari

s m

uco

sa

exte

nsi

on

of

mu

scu

lari

s m

uco

sa

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

gastric pitsgastric pits

gastric glandsgastric glands

Gastric glandsGastric glandsSlide 155, 40x obj.Slide 155, 40x obj. Slide 155, 20x obj.Slide 155, 20x obj.

Slide 156, 40x obj.Slide 156, 40x obj. Slide 157, 40x obj.Slide 157, 40x obj.

PCPC

CCCC

PCPC

CCCC

muscularis mucosa

muscularis mucosa

PCPC

CCCC PCPC CCCC

PC = parietal cellsCC = chief cells

muscularis mucosamuscularis mucosa

Slide 156, stomach, H&E, 4x obj. Slide 156, stomach, H&E, 4x obj.

mucosamucosa

muscularis mucosamuscularis mucosa

submucosasubmucosa

muscularis externamuscularis externa

outer longitudinal layerouter longitudinal layer

middle circular layermiddle circular layer

innermost oblique layer

innermost oblique layer

gastric pitsgastric pits

gastric gastric glandsglands

parietal cells parietal cells (mostly)(mostly)

chief cells chief cells (mostly)(mostly)

Slide 160, stomach, PAS, 10x obj.Slide 160, stomach, PAS, 10x obj.(PAS stains mucus purple) (PAS stains mucus purple)

gastric glandsgastric glands

muscularis mucosamuscularis mucosa

submucosasubmucosa

gastric pitsgastric pits

Slide 162, Slide 162, pylorus-duodenum junctionpylorus-duodenum junction

pyloruspylorus

transition to duodenumtransition to duodenum

duodenumduodenum

Slide 162, pylorus, 10x obj.Slide 162, pylorus, 10x obj.

pyloric glands

pyloric glands

gastric pits

gastric pits

muscularis mucosa

muscularis mucosa

submucosa

submucosa

muscularis externa

muscularis externa

Slide 162, pylorus, 40x obj.Slide 162, pylorus, 40x obj.

pyloricpyloricglandgland

(mucous)(mucous)

gastric pit

muscularis m

ucosa

muscularis m

ucosa

Slide 162 Slide 162 transition to duodenum transition to duodenum

4x obj.4x obj.

duodenalduodenalmucosamucosa

pyloricpyloricmucosamucosa

pyloric glands (above muscularis mucosa)

pyloric glands (above muscularis mucosa)

submucosalsubmucosal(Brunner’s)(Brunner’s)

glands --below glands --below muscularis mucosamuscularis mucosa

duodenalduodenalmucosalmucosal

epitheliumepithelium

submucosal (Brunner’s) glandssubmucosal (Brunner’s) glands(mostly below muscularis mucosa (mostly below muscularis mucosa but some portions extend above)but some portions extend above)

muscularis m

ucosa

muscularis m

ucosa

Brunner’s glandsBrunner’s glands

Slide 162, transition to duodenum, 10x obj.Slide 162, transition to duodenum, 10x obj.

Slide 162, duodenum, 4x obj.Slide 162, duodenum, 4x obj.

duodenalduodenalmucosamucosa

muscularis mucosamuscularis mucosa

Brunner’s glandsBrunner’s glands

submucosasubmucosa

Slide 162, duodenum, 20x obj.Slide 162, duodenum, 20x obj.

du

od

enal

ep

ith

eliu

m

du

od

enal

ep

ith

eliu

m

muscularis mucosamuscularis mucosa

Brunner’s glandsBrunner’s glands

lamina proprialamina propria

Brunner’s glandsBrunner’s glands