Muscular System

The muscle organs are Smooth Muscle, Skeletal Muscle, and Cardiac Muscle. Muscle is attached to bone by tendons and other tissue and exerts force by converting chemical energy into tension and contraction. Muscles move and make us capable of a variety of actions, but muscle only really contracts and becomes shorter: they pull but they cannot push. Muscle is made up of millions of tiny protein filaments which work together to produce motion in the body. The muscular system includes three types of muscles. They are smooth, which are found on the walls of internal organs, cardiac, which is found only in the heart, and skeletal muscles, which help strenthen the body and connect to bones.

Disorders

• Duchenne Dystrophy (Inherited disease that lacks the muscle dystrophin)
• Facioscapulohumeral Dystrophy (weakness of the face and arms)
• Limb-Girdle Dystrophy (weakness of the upper legs and arms)
• Myotonic Dystrophy (causes weakness of muscles and the eyes, the heart, and testes)
• Polymyositis ( a muscle inflammatory disease causing fatigue and weakness)
• Myasthenia Gravis (causes fluctuating muscle weakness, especially in muscles controlling eye movements, eye opening, facial mobility, and swallowing)
• Amyotrophic Lateral Sclerosis (muscle weakness from progressive death of the nerve cells that control voluntary movement)