Session 5 - Stomach anatomy Flashcards Preview

Semester 3 - Gastrointestinal > Session 5 - Stomach anatomy > Flashcards

Flashcards in Session 5 - Stomach anatomy Deck (30):
1

What are the five main parts of the stomach?

• Cardia
• Fundus
• Body
• Antrum
• Pylorus

2

What are the two main borders of the stomach?

• The lesser curvature
• The greater curvature

3

Where does the oesophagogastric junction lie?

• To the left of T11 on the horizontal plane that passes through th xiphoid process

4

What is the line at which osophageal mucosa changes to gastric?

The Z line

5

What acts as a physiological sphincter?

• The diaphragmatic musculature forming the oesophageal hiatus functions as a physiological spgnicter that contracts and relaxes

6

What two structures prevent refllux into the oesophagus?

• Cardiac notch
• Diaphragmatic musculature

7

What is the pyloric sphincter?

• Thick, circular muscle coat acts as sphincter, control discharge of the stomach contents through the pyloric orifice into the duodenum

8

What is the folded shape of the gastric mucosa known as?

• Rugae

9

What are the three histologically distinct zones of the gastric mucosa?

• Cardia
• Fundus and body

Pyloric

10

What is a gastric canal?

• Channel generated by folds in the gastric mucosa through which saliva and other fluids can reach the pyloric sphincter

11

What cells are present in the cardia?

• Neck cells - Mucus

12

What cells are present in the fundus and body?

• Neck cells - Mucus
• Parietal - acid
• Chief - Pepsinogen

13

What cells are present in the pyloris?

• Neck cells - Mucus
• G-cells - Gastrin

14

Where are peptic ulcers common?

• In the antrum ad along the lesser curvature of the stomach

15

What is the greater omentum?

• A prominent, four layered peritoneal fold that hangs down like an apron from the greater curve of the stomach
• After descending it folds back and attachs to the anterior surface of the transverse colon and its mesentery

16

What is the lesser omentum?

• A much smaller, double-layered peritoneal fold that connects the lesser curvature of the stomach and the proximal part of the duodenum to the liver.

Connects the stomach to the portal traid

17

What is the epiploic foramen?

• The greater and lessaer omentum communicate through the omental foramen, and opening situated posterior to the free edge of the lesser omentum.

18

Where is the arterial supply of the stomach derived from?

• The coeliac trunk
• Originated from the abdominal aorta

19

What are the three main branches of the coeliac trunk?

• Left gastric artery
• Splenic artery
• Common hepatic artery

20

What is the blood supply of the lesser curvature of the stomach?

• Coeliac trunk -> Left gastric
• Coeliac trunk -> Common Hepatic -> Right gastric

21

What is the blood supply of the greater curvature of the stomach?

• Coeliac trunk -> Splenic -> Left gastro-omental
• Coeliac trunk -> Common hepatic -> Gastroduodenal -> Right gastro-omental

22

What is the blood supply of the fundus and the body of the stomach?

• Coeliac trunk -> Splenic -> Posterior gastric/ Small gastric

23

List the veins of the stomach

• Left gastric vein
• Right gastric vein
• Short gastric vein
• Left gastro-omental vein
• Right gastro-omental vein

24

What is the path of the left gastric vein?

• Follows the course of the left gastric artery

Drains into the hepatic portal vein

25

What is the path of the right gastric vein?

• Follows the course of the right gastric artery

Drains into the hepatic portal vein

26

What is the path of the short gastric vein?

• Follows the course of the short gastric artery
• Drains into the splenic vein
○ Joins SMV to form hepatic portal vein

27

What is the path of the left gastro-omental vein?

• Follows the course of the left gastro-omental artery
• Drains into the splenic veins
○ Joints SMV to form hepatic protal vein

28

What is the path of the rigth gastro-omental vein?

• Follows the course of the right gastro-omental artery
• Drains into the superior mesenteric vein

Joins splenic vein to form hepatic portal vein

29

What can acute gastritis of the stomach be caused by?

• NSAIDS/Alcohol
• Exfoliation of the surface epithelial cells and decreased secretion of protective mucus

30

What can chronic gastritis of the stomach be cause by?

• Infection with the bacteria helicobacter pylori

Inflammatory change sin the mucosa resulkt in atrophy and epithelial metaplasia