Which of the following is incorrect?

Fusiform muscle fibers are a specific shape of muscle fiber characterised by their elongated and spindle-like appearance. They are thicker in the middle and taper at both ends, resembling a spindle. These fibers are found in unstriated muscles, also known as smooth muscles, which are responsible for involuntary movements. Striated muscles are under conscious control and allow for precise and coordinated movements like walking, running, and lifting weights. On the other hand, smooth muscles, found in the walls of internal organs, blood vessels, and the digestive tract, are not fusiform-shaped and function involuntarily to control activities like digestion, blood flow, and respiration.