Lesson 68: Monogastric Stomach Anatomy

9-12

Stomach of dog is located at ribs _________

fundus

Dog

1

Left side

body

Dog

2

Left side

pylorus

Dog

3

Right side

pyloric canal

Dog

4

fundus

Cat

1

body

Cat

2

pyloric canal

Cat

3

Only part of stomach located on the right

Creates "J" shape

pyloric antrum

Cat

4

cardia

Cat

5

angular notch

Cat

most prominent in cat

omentum

mesentery of the stomach

lesser omentum

1

between liver and lesser curvature of the stomach

lesser omentum

between liver and lesser curvature of the stomach

greater omentum

2

between body wall (roof) and greater curvature of the stomach

greater omentum

between body wall (roof) and greater curvature of the stomach

celiac artery

2

hepatic artery

3

splenic artery

4

gastroduodenal artery

7

cranial mesenteric artery

9

left gastric artery

5

lesser curvature

right gastric artery

8

lesser curvature

left gastroepiploic artery

6

greater curvature

right gastroepiploic artery

14

greater curvature

celiac artery

1

cranial mesenteric artery

2

caudal mesenteric artery

3

left gastric artery

2

sympathetic trunk

1

sympathetic innervation

vagus nerve

1

parasympathetic innervation

dorsal vagal trunk

2

parasympathetic innervation

ventral vagal trunk

3

parasympathetic innervation

gastric pits

microanatomy of the stomach

1

invagination of the epithelium, lined by simple columnar epithelium

gastric glands

microanatomy of the stomach

2

lamina muscularis

microanatomy of the stomach

3

non-glandular region

yellow

cardiac gland region

white

fundic gland region

red and pink

pyloric gland region

blue

cardiac gland region

- shallow gastric pits

- simple, branched

- tubular (mainly mucous secretion)

fundic gland region

- deeper gastric pits

- simple, branched

- mucus neck cells

- chief/zymogen cells (pepsinogen --> pepsin)

- parietal cells (HCl)

pyloric gland region

- deeper gastric pits

- simple branched coiled tubular

- G-cells: secrete gastrin, which stimulates parietal cells in fundic glands to produce HCl

- D-cells: secrete somatostatin (inhibits gastrin secretion)

- few parietal cells