Striation reflects the sarcomere arrangement, not the control system, which is why cardiac muscle is striated yet involuntary. Sort each feature by the muscle type it belongs to.

Skeletal muscle: Voluntary, many nuclei, Bone-bound, striated

Cardiac muscle: Intercalated discs, Striated, involuntary

Smooth muscle: Unstriated, organ walls

Striation tracks the sarcomere arrangement, not the control system, cardiac muscle is striated yet involuntary. Intercalated discs are the heart’s alone, and they are what make it contract as one coordinated unit.