In order to understand the concept behind muscle contraction, it is very important that the muscle structure known. Muscle is composing of “Actin” filaments and the filaments of “Myosin-II”, which is a protein formed with the help of two polypeptides. Muscles are made up of bundles of fibers that seem similar to a bundle of thins wires held together. These fibers are massive and formed as a process of the fusion of many cells together. In fact, muscle fibers are multinucleated, which means that a single large cell has multiple ...