TUESDAY, NOVEMBER 6, 2012 COACH WILLIAMS Tissue that makes the body move. Network of muscles include: Voluntary muscles – muscles that must be told to move Involuntary muscles – muscles that move on their own The human body contains more than 650 muscles. They are all made of the same material which is a type of elastic. Cardiac Skeletal Smooth Found only in the heart (makes up the heart) It is a “twitch” muscle; it only performs short single contractions WHAT TYPE OF MUSCLE DO YOU THINK THE CARDIAC MUSCLE IS? INVOLUNTARY OR VOLUNTARY Muscles that show you how strong you are aka – “striated muscle” – the light and dark parts of muscle fibers make them look striped Skeletal muscles are held to the bones by tendons (cords made of tough tissue) Skeletal muscles work with your bones to give your body power and strength This combination is referred to as “musculoskeletal system”. VOLUNTARY OR INVOLUNTARY? DELTOID MUSCLE (SHOULDER) PECTORALS (BOTH SIDES OF UPPER CHEST) ABDOMINALS (ABS) BICEPS QUADRICEPS (QUADS) GLUTEUS MAXIMUS Your brain and body tell these muscles what to do Smooth muscles are at work all over your body Stomach and digestive system – they contract (tighten up) to allow food to go through the body Bladder – when relaxed (hold in urine); when contract (let it out or “tinkle”) INVOLUNTARY OR VOLUNTARY?