In human anatomy, the muscular system is the set of over 650 muscles in the body, whose primary function is to generate movement, whether voluntary or involuntary, visceral and skeletal muscles, respectively. Some of the muscles of both forms may be threaded, so they can be categorized as mixed. The muscular system enables the skeleton to move, maintain its stability and shape of the body. In vertebrates can be controlled through the nervous system, although some muscles (such as the heart) can operate autonomously. Approximately 40% of the human body consists of muscles i.e. that ...