Stomach and spleen

Question 1

What are the layers of the GI mucosa

Answer 1

epithelium, lamina propria, muscularis mucosa

Question 2

What is the nervous control of muscularis mucosa

Answer 2

Submucosal /Meissner’s plexus

Question 3

What does the submucosal plexus control

Answer 3

the muscularis muscosa

Question 4

What does Meissner’s plexus control

Answer 4

the muscularis mucosa

Question 5

What makes up the submucosa

Answer 5

loose CT

blood vessles, nerves, lymphatics + glands

Question 6

What controls the muscles of the gut wall

Answer 6

Myenteric/Auerbach’s plexus

Question 7

What does the myenteric plexus control

Answer 7

the muscles of the gut wall

Question 8

What does Auerbach’s plexus control

Answer 8

the muscles of the gut wall

Question 9

What are the layers of the muscularis externa in the GI tract

Answer 9

outer longitudinal layer + inner circular layer, with an innermost oblique muscle layer in the stomach only

Question 10

What is the relative position of the serosa to the adventita in the GIT

Answer 10

adventitia is deep to the serosa

S uperficial, S erosa

Question 11

At what level is the inferior oesophageal sphincter

Answer 11

T11

Question 12

Is the superior mesenteric artery to the right or left of the superior mesenteric vein

Answer 12

to the left, towards the ascending part of the duodenum

Question 13

What arterial trunk supplies the stomach

Answer 13

coeliac trunk

Question 14

Describe the arterial supply of the stomach

Answer 14

Anastamoses along each curvature:
On the lesser curvature it is anastamoses of the right and left gastic arteries
On the greater curvature it is anastamoses of the right and left gastro-omental arteries (because the greater omentum hangs from the greater curvature!)

Question 15

What is the source of the right gastric artery

Answer 15

the right gastric artery is a branch of the common hepatic artery, arising from the coeliac trunk

Question 16

What is the source of the left gastric artery

Answer 16

the left gastric artery arises directly from the coeliac trunk

Question 17

What is the source of the right gastro-omental arery

Answer 17

the right gastro-omental artery is a terminal branch of the gastro-omental artery, which arises from the common hepatic artery, which arises from the coeliac trunk

Question 18

What is the source of the left gastro-omental artery

Answer 18

the left gastro-omental artery is a branch of the splenic artery, which arises from the coeliac trunk

Question 19

How does the right gastric vein drain

Answer 19

into the hepatic portal vein

Question 20

How does the left gastric vein drain

Answer 20

into the hepatic portal vein

Question 21

How does the short gastric vein drain

Answer 21

into the superior mesenteric vein

Question 22

How do the right and left gastro-omental veins drain

Answer 22

into the superior mesenteric vein

Question 23

Describe the sympathetic innervation of the stomach

Answer 23

T6-T9, coeliac plexus via the greater phlanchic nerve

Question 24

Describe the parasympathetic innervation of the stomach

Answer 24

ant. + post. vagal trunks derived from the vagus nerves

Question 25

Which vagus nerve gives rise to the anterior vagal trunk

Answer 25

The left vagus

Question 26

Which vagus nerve gives rise to the posterior vagal trunk

Answer 26

The right vagus

Question 27

What are the ligaments of the spleen

Answer 27

gastrosplenic

renosplenic

Question 28

What are the surfaces of the spleen

Answer 28

diaphragmatic and the visceral