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.
Despite the small amount of it compared with other muscle types, cardiac muscle has a remarkable share of blood supply with a vivid energy metabolism. Smooth muscle is mostly found in the respiratory, urinary, and gastrointestinal tract, the reproductive system, and blood vessels.