Skeletal muscle, also known as striated muscle, is a type of muscle tissue that is attached to the bones of the skeleton and is responsible for the movement of limbs and other parts of the body. It is composed of long, cylindrical cells called muscle fibers, which contain the protein actin and myosin. The acronym LAT stands for 'longitudinal arrangement of actin and myosin, ' which describes the arrangement of these proteins in skeletal muscle cells.