MICROANATOMY

Detailed explanation-1: -In conclusion, the correct order of muscle structures is muscle, fascicles, fibers, myofibrils, and sarcomeres, from largest to smallest.

Detailed explanation-2: -The smallest contractile unit of skeletal muscle is the muscle fiber or myofiber, which is a long cylindrical cell that contains many nuclei, mitochondria, and sarcomeres (Figure 1) [58].

Detailed explanation-3: -If we go from outside to inside, the correct muscle order would be epimysium, perimysium, fascicle, endomysium, muscle fibers, sarcolemma, myofibrils, and sarcomeres.

Detailed explanation-4: -Skeletal Muscles 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.