Military forces have worn distinctive uniform items for centuries to create a psychological advantage and boost their esprit de corps, but the military use of berets is a relatively recent phenomenon. In the 16th and 17th centuries, the Blue Bonnet became a de facto symbol of Scottish Jacobite forces.
Muscle cells have adapted to their job by contracting and relaxing.  When calcium levels are increased the muscle cells contract. On the  other hand, when calcium levels droâ¦p the muscle cells get relaxed.
Function. Skeletal muscles have three major functions. First, skeletal muscle works with the bones of the skeletal system to produce movement. Second, it muscle provides stabilization. Finally, it generates heat; providing critical support to the regulation of body temperature.Skeletal muscle has four important characteristics that allow for its function.irst, skeletal muscle works with the bones of the skeletal system to produce movement. Second, it muscle provides stabilization. Finally, it generates heat; providing critical support to the regulation of body temperature.