What two bands of the sarcomere do we see as the striations in the skeletal muscle?

The striations in skeletal muscle are primarily due to the arrangement of two bands in the sarcomere: the A band and the I band. The A band consists of thick filaments (myosin) and appears darker, while the I band contains thin filaments (actin) and appears lighter. The alternating pattern of these bands creates the characteristic striated appearance of skeletal muscle. Additionally, the Z line, which defines the boundaries of each sarcomere, is also visible and contributes to the striated pattern.