Cardiac Muscle Striations. Cardiac muscle occurs exclusively in the heart. Note central location of muscle nuclei.
The ANP stimulates the diuresis and thus lowers the blood pressure. Muscle tissue in which the contractile fibrils in the cells are aligned in parallel bundles so that their different regions form stripes visible in a microscope. This hematoxylin and eosin stained longitudinal section shows cardiac muscle fibers forming such a feltwork in the myocardium of the heart.
Cardiac muscle cells are specialized striated muscle cells found only in the heart.
Cardiac muscle is striated like skeletal muscle as the actin and myosin are arranged in sarcomeres just as in skeletal muscle. Cardiac muscle is striated though the cross striations are not as prominent as in skeletal muscle. Cardiac muscle is striated like skeletal muscle as the actin and myosin are arranged in sarcomeres just as in skeletal muscle. Cardiac muscle composed of the contractile cells of the heart has a striated appearance due to alternating thick and thin filaments composed of myosin and actin.
