Muscle Structure and Muscle Contraction

Skeletal muscle is basically composed of muscle fibers and myofibrils. The muscle fibers or cells are individually enclosed in layers of endomysium connective tissue, bound together in bundles of fasciculi, and covered by perimysium tissue. Muscle fasciculi are then combined to form specific muscle tissue and are held together by epimysium and fascia band coverings, respectively (Figure 4.1).