Gastro Medicine - Gastroduodenal artery

Question 1

What does the Gastroduodenal artery supply?

Answer 1

• Pylorus, proximal part of the duodenum,
• and indirectly to the pancreatic head (via the anterior and posterior superior pancreaticoduodenal arteries)

Question 2

What is the path of the Gastroduodenal Artery?

Answer 2

• Most commonly arises from the common hepatic artery of the coeliac trunk
• Terminates by bifurcating into the right gastroepiploic artery and the superior pancreaticoduodenal artery

Question 3

What are the functions of the 4 layers of the gastrointestinal (GI) tract?

Answer 3

1. Mucosa:

Can be further subdivided into:

• epithelium
• lamina propria
• muscularis mucosae

2. Submucosa:

• Contains Meissner’s (submucosal) plexus -
• primarily secretion and blood flow

3. Muscularis externa

• Contains Auerbach’s (myenteric) plexus -
• primarily controls motility of GI smooth muscle

4. Serosa / adventitia

• Intraperitoneal = serosa
• Retroperitoneal = adventitia

Question 4

Diagram showing the main layers of the gastrointestinal tract:

Answer 4