Cardiac muscles are specialized muscle tissues found only in the heart. They are responsible for pumping blood throughout the body and are involuntary, meaning they operate without conscious control. Cardiac muscle cells are interconnected, allowing them to work together efficiently and maintain a steady heartbeat. These muscles have unique properties, such as the ability to contract rhythmically and resist fatigue. They contain striations, similar to skeletal muscles, but differ in structure and function. The heart's electrical system, including the sinoatrial node, regulates the contractions of cardiac muscles, ensuring a consistent flow of blood.