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THE MUSCULAR SYSTEM Kinds of Muscle • Smooth Muscle – found in digestive tract and in walls of blood vessels • Cardiac Muscle – found only in the heart • Skeletal Muscle – attached to bones for movements and helps protect your inner organs. • Smooth and Cardiac muscle are involuntary muscles whereas skeletal muscles can be both involuntary and voluntary. Muscles work in pairs * Flexors and Extensors Exercise Resistance Exercises Aerobic Exercises Muscle Injury 1 • A strain is an injury in which a tendon is overstretched 2 • Tendonitis is when a tendon becomes inflamed 3 • People who exercise too much can hurt their tendons Fun Facts about Muscles • Your body contains 600 muscles • The Largest muscles are in your legs, buttocks and arms because they must move the biggest bones • All together they make up 1/3 of your body weight * Illegal Substances used to make muscles stronger are called steroids Muscular Diagram