1 Battle star, an award issued to U.S. Navy ships for participation in battles.  Battlestar (fictional spaceship), a type of spaceship in the original and new television series Battlestar Galactica.
Smooth muscle is fundamentally different from skeletal muscle and cardiac muscle in terms of structure, function, regulation of contraction, and excitation-contraction coupling. Smooth muscle cells known as myocytes, have a fusiform shape and, like striated muscle, can tense and relax.
Cardiac muscle occurs only in the heart, and consists of small cells that are striated and under involuntary control. Smooth muscle is found in the walls of hollow organs, and consists of small elongated cells that are not striated and are under involuntary control. Special Characteristics of Muscle Tissue. Excitability, or irritability, is the ability to receive and respond to a stimulus.