According to the sources, muscles are classified based on their location and appearance: (1) Skeletal muscles (found in limbs like the thighs) are striated (striped appearance) and voluntary (under conscious control) . (2) Visceral muscles (found in hollow organs like the intestine) are nonstriated (smooth) and involuntary . (3) Cardiac muscles (found in the heart) are striated but involuntary in nature . Based on these definitions, only the description for the thighs is correct.