A 49-year-old man presents with acute abdominal pain and jaundice. Radiographic studies reveal a tumor in the head of the pancreas. Which of the following structures is most likely being obstructed?

Anatomy

A 49-year-old man presents with acute abdominal pain and jaundice. Radiographic studies reveal a tumor in the head of the pancreas. Which of the following structures is most likely being obstructed?

The action of digastric muscle is:

Which of the following vessels supply the anal canal?

All of the following muscles are elevators of the mandible EXCEPT: