endomysium

The endomysium is a thin layer of connective tissue that wraps around individual muscle fibers (cells) within skeletal muscles. This connective tissue sheath is primarily composed of collagen, a structural protein that provides strength and support. The endomysium, along with the perimysium (which surrounds muscle bundles) and epimysium (which encloses entire muscles), forms a continuous network of connective tissue throughout the muscle. This organization is crucial for the overall structure and function of skeletal muscles, which are responsible for movement and supporting the body's weight. Within each muscle fiber, numerous myofibrils, made of actin and myosin, are the smallest units of contraction.12