The functional unit of contractile system in striated muscle is

Step-by-step solution

A skeletal muscle consists of a bundle of long fibres running the length of the muscle. Each fibre is a single cell with many nuclei. Skeletal muscle is also called as striated muscle because the regular arrangement of the myofilaments creates as repeating pattern of light and dark bands. Each repeating unit is a sarcomere, the basic functional unit of the muscle. The borders of the sarcomere, the Z -lines are lined up in adjacent myofibrils and contribute to the striations visible with a light microscope. The thin