Review Question - QID 214288

A 70-year-old Hispanic woman is brought by her daughter to the emergency department with complaints of diffuse abdominal pain for the past 3 months. The patient reports that she has a history of gallstones in the distant past and that this pain does not seem very different from that. On further questioning, the patient reports that her pants have felt looser recently. On exam, the patient has a temperature of 98.6°F (37.0°C), blood pressure is 110/76 mmHg, pulse is 80/min, and respirations are 12/min. Her sclerae are anicteric. She has diffuse abdominal pain but no tenderness to palpation. Her abdomen is generally soft with a palpable firm mass in the right upper quadrant. A radiograph is taken and shown in Figure A. The patient is then admitted for further management. Which of the following structures derives from the same embryonic germ layer as the affected tissue in this patient?