What type of muscle is specialized and found only in the heart?

Cardiac muscle is a specialized type of muscle found exclusively in the heart. Its unique structure includes intercalated discs, which allow for the synchronized contraction of heart muscle cells, enabling the efficient pumping of blood throughout the body. This muscle type is involuntary, meaning it is not under conscious control, which differentiates it from skeletal muscle that is voluntary. Cardiac muscle cells are striated, similar to skeletal muscle, but they are distinct in their function and location, as they are inherently designed for continuous, rhythmic contractions necessary for maintaining circulation. Other muscle types, such as skeletal and smooth muscle, serve different functions and are not confined to the heart.