Striated muscle fibers, also known as skeletal muscle fibers, are responsible for voluntary movement in the body. These fibers are unique in their structure, possessing a striped or striated appearance due to the arrangement of their myofibrils. There are several synonyms for striated muscle fibers, including skeletal muscle fibers, voluntary muscle fibers, and cross-striated muscle fibers. These fibers are different from smooth and cardiac muscle fibers, which have different arrangements of their myofibrils and serve different purposes in the body. Striated muscle fibers play an important role in movement and are essential for maintaining muscle tone, posture, and overall physical strength.