MUSCLE PHYSIOLOGY

Detailed explanation-1: -Myofibers are grouped into larger units called muscle fascicles, which are enveloped together by connective tissue (called epimysium ) into anatomically recognized muscles. Epimysium extends internally between fascicles, forming septa that are called perimysium.

Detailed explanation-2: -Skeletal muscle fibers are organized into groups called fascicles. Blood vessels and nerves enter the connective tissue and branch in the cell.

Detailed explanation-3: -Approximately 20–80 of these muscle fibers are grouped together in a parallel arrangement called a muscle fascicle or fiber bundle that is encapsulated by a perimysium, which is thicker than the epimysium enclosing each of the bundled muscle fibers.