Cardiac cells, also known as cardiomyocytes, are specialized muscle cells found in the heart. They are responsible for the heart's ability to contract and pump blood throughout the body. These cells are unique because they can generate electrical impulses, allowing them to communicate with each other and coordinate heartbeats. Unlike other muscle cells, cardiac cells have a high number of mitochondria, which provide the energy needed for continuous contraction. They are interconnected by structures called intercalated discs, which facilitate the rapid transmission of electrical signals. This ensures that the heart functions efficiently and maintains a steady rhythm.