Skeletal muscles show alternate light and dark bands or striations and hence called striated muscles. The cells of this tissue are long, cylindrical, unbranched and multinucleate (having many nuclei). Smooth or involuntary muscles are unstriated muscles. The cells are long with pointed ends (spindleshaped) and uninucleate (having a single nucleus). Cardiac muscles or Heart muscle cells are cylindrical, branched and uninucleate. They are involuntary in nature. 
Related Theory Muscular tissue consists of elongated cells, also called muscle fibres. This tissue is responsible for movement in our body. Muscles contain special proteins called contractile proteins, which contract and relax to cause movement.