Answer:
Perimysium
Step-by-step explanation:
Perimysium is a layer of connective tissue that strengthen and increases the muscle fitness. Perimysium shows direct connection with muscle fibers and epimysium.
The perimysium layer separates the muscle into the small bundles called fascicles with different dimensions. Perimysium regulates the role of epimysial fascia in motor coordination.
Thus, the answer is perimysium.