LOCOMOTION to occur.Unstriated musclesIt is also called SMOOTH muscle.It is generally involuntary and differs from striated muscle in the MUCH higher actin/myosin ratio.Found particularly in blood vessel walls, surrounding the intestine (particularly the gizzard in birds), and in the uterus.Voluntary musclesThose muscles that can be controlled at one’s will (volition) are called voluntary muscles.The skeletal muscles are voluntary.Some examples of voluntary muscles INCLUDE the biceps, the triceps, the quadriceps, the diaphragm, pectoral muscles, abdominals, hamstrings, etc.Involuntary musclesA muscle that contracts without conscious control.Some examples of involuntary muscles include the cardiac muscle and smooth muscle lining the intestinal tracts, blood vessels, urogenital tracts, respiratory tract, etc.Muscle tissue facilitates the movement of the animal or body parts through the contraction and relaxation of each muscle fiber with the help of muscle cells.Three types of muscle fibers occur in animals (muscle cells are only present in the taxonomic kingdom):Cardiac.Smooth.Skeletal (Striated).The upper arm possesses skeletal muscles and they are voluntary muscles with the muscle fibers being cylindrical.The heart comprises cardiac muscles which are striated in appearance but involuntary in their function.