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.
The main function of any muscle is to contract. Some other functions of muscles and the muscular system are that they: maintain the body's posture stabilize joints produce mo â¦ vement generate heat.