This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Circulation, Subject name: Physiology
[{'content': 'The epicardium is one of the three layers of the hea. It is: \nSelect and explain. \nA. Continuous with the endocardium., B. Also known as the visceral pericardium., C. Composed of modified cardiac muscle cells., D. Capable of increasing intraventricular pressure.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The pericardium is a fibroserous sac that encloses the hea. The innermost layer of the pericardium, the epicardium, is also known as the visceral pericardium.', 'role': 'assistant'}]