This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'The system responsible for transporting blood around the body is \nSelect and explain. \nA. Urinary system, B. Circulatory system, C. Lymphatic system, D. Digestive system', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The circulatory system consists of the heart, the blood vessels and the blood,\nand its function is to transport the blood around the body', 'role': 'assistant'}]