Part one of term paper
Muscle, tissue or organ of the body characterized by the ability to contract, usually in response to a stimulus from the nervous system. The basic unit of all muscle is the myofibril, a minute, threadlike structure composed of complex proteins. Each muscle cell, or fiber, contains several myofibrils, which are composed of regularly arranged ...

Part two of term paper
... in size according to the jobs they do. These muscles constitute 40% of body weight. The special function of muscle tissue is contraction. There are three different kinds of muscle tissue: striated muscle, smooth muscle, and cardiac muscle. Most of the body’s muscle consists of striated muscle, which is the skeletal muscle. It is also called voluntary muscle because it can be consciously controlled through the central nervous system. Smooth muscle is the muscle of the internal organs an ...