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: Anatomy
[{'content': 'Small bones are supplied by \nSelect and explain. \nA. Nutrient artery, B. Periosteal vessels, C. Subperiosteal, D. Epiphyseal', 'role': 'user'}, {'content': "Answer: B \nExplanation: Periosteal arteries\xa0\n\nThese are especially numerous beneath the muscular and ligamentous attachments.\xa0\nThey ramify beneath the periosteum and enter the Volkmann's canals to supply the outer 1/3 of the cortex.\xa0\n\nIn miniature long bones, the infection begins in the middle of the shaft rather than at the metaphysis because, the nutrient artery\xa0 breaks up into a plexus immediately upon reaching the medullary\xa0 cavity. In the adults, however, the chances of infection are minimized because the nutrient artery is mostly replaced by the periosteal vessels.\nKEY CONCEPT:\nShort bones are supplied by numerous periosteal\xa0vessels which\xa0enter\xa0their nonarticular\xa0surfaces.", 'role': 'assistant'}]