What is the structure of striated muscle tissue?

Muscles are fibrous, dense tissues whose main function is to allow the body to move through repeated contraction and relaxation. Besides movement, muscle is also responsible for maintaining posture, stabilizing joints, and increasing body heat through muscle function.
The striated muscle is also known as skeletal muscle because it is attached primarily to bones and skin and is responsible for the movement of the body and limbs. Skeletal muscle is made up of muscle fibers, long, fused cells containing multiple nuclei. Muscle fibers are packed together in bundles with connective tissue and packed with myofibrils.