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
Intercalated disc is characteristic of: 
Select and explain. 
A. Comp cyclone, B. Cardiac muscle, C. Skeletal muscle, D. Hyaline cartilage
B: Cardiac muscle
Answer: B: Cardiac muscle 
Explanation: 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.