GI Digestive System Anatomy 2

Question 1

Which layer of the GI tract wall contains blood vessels, lymphatics, and the submucosal (Meissner's) plexus?

Accepted Answer

Submucosa

Answer

The submucosa contains connective tissue, blood vessels, lymphatics, and Meissner's plexus, which regulates secretion and blood flow.

Question 2

The myenteric (Auerbach's) plexus is located between which two layers of the GI tract?

Accepted Answer

Circular and longitudinal muscle layers

Answer

Auerbach's plexus lies between the inner circular and outer longitudinal smooth muscle layers, coordinating peristalsis.

Question 3

Which structure connects the stomach to the liver and contains the hepatic artery, portal vein, and bile duct?

Accepted Answer

Hepatoduodenal ligament

Answer

The hepatoduodenal ligament forms the free edge of the lesser omentum and contains the portal triad structures.

Question 4

The hepatic flexure of the colon is located in which abdominal quadrant?

Accepted Answer

Right upper quadrant

Answer

The hepatic (right colic) flexure lies beneath the liver in the right upper quadrant, where the ascending colon bends to become the transverse colon.

Question 5

Which portion of the duodenum is retroperitoneal and crosses the vertebral column?

Accepted Answer

Third (horizontal) part

Answer

The third part of the duodenum crosses anterior to the aorta and L3 vertebra and is compressed by the superior mesenteric artery in SMA syndrome.

(GI) Gastrointestinal Practice Test