structure of cardiac muscle fibers. anatomy of cardiomyocyte

anatomical anatomy background biology blood body cardiac cardiomyocyte care cell contractile contraction coronary diagram disease dystrophy endocardium epicardium fiber filament health healthy heart human illustration image innervation intermediate intestine medical medicine movement muscle muscular myocardium myocyte myofibril myosin nerve nucleus organ receptor sarcomere sarcomeres schematic science scientific set skeletal small smooth striated structure system thick tissue vector