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.
Muscular System. The muscular system is composed of more than 600 muscles. These include the involuntary muscles of the heart and the smooth muscles of the internal organs. The skeletal muscles connect to the bones and work with connective tissue at the joints to allow for movement.The muscles connect to the nervous system and allow initiation of movement through nerve signals to and from the brain.he skeletal system and the muscular system work together as the framework for the body as well as providing the pieces that allow for movement.