How intercalated discs form in cardiac muscles.

Intercalated 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. By contrast, skeletal muscle consists of multinucleated muscle fibers and exhibit no intercalated discs. 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