This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Histology, Subject name: Anatomy
[{'content': 'Intercalated disc is characteristic of: \nSelect and explain. \nA. Comp cyclone, B. Cardiac muscle, C. Skeletal muscle, D. Hyaline cartilage', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. cardiac muscleIntercalated discs are microscopic identifying features of cardiac muscle. Cardiac muscle consists of individual heart muscle cells (cardiomyocytes) connected by intercalated discs to work as a single functional organ or syncytium. Intercalated discs support synchronized contraction of cardiac tissue. They occur at the Z line of the sarcomere and can be visualized easily when observing a longitudinal section of the tissue.', 'role': 'assistant'}]