Unit IIIA: Muscular and Skeletal System, Skeletal Muscle – Ultra Structure; Contractile Proteins & Muscle Contraction; Skeletal System and Its Functions; Joints; Disorders of the Muscular and Skeletal System: Myasthenia Gravis, Tetany, Muscular Dystrophy, Arthritis, Osteoporosis, Gout, Regormortis