1 Meanwhile, for icing, combine milk and flour in a saucepan; cook until thick. Cover and refrigerate.  In a bowl, beat butter, shortening, sugar and vanilla until creamy. Add chilled milk mixture and beat 10 minutes.
Muscular system. The muscular system is an organ system consisting of skeletal, smooth and cardiac muscles. It permits movement of the body, maintains posture, and circulates blood throughout the body. The muscular system in vertebrates is controlled through the nervous system, although some muscles (such as the cardiac muscle) can be completely autonomous.
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.