The Human body
The Muscular System Helps Your Body MoveMost muscles work
together in pairs. One muscle pulls while the other muscle relaxes.
When you bend your arm the biceps muscle pulls and the triceps
muscle relaxes. When you make your arm straight, the biceps muscle
relaxes and the triceps muscle pulls.
The Function of MusclesMuscles are very important. They help you
do almost everything from pumping blood throughout your body to
lifting your heavy backpack. You control some of your muscles and
others, like your heart, do their jobs without you thinking about
them at all.
Did you know?You use 17 muscles when you smile.You use 43
muscles when you frown.
Muscle System FunctionsProvides voluntary movement of
bodyEnables breathing, blinking, and smilingAllows you to hop,
skip, jump, or do push-ups Maintains postureProduces heat
4http://images.google.com/imgres?imgurl=http://www.justinsokolowski.net/graphics/animatedBlinkingEyeSlowgreen.gif&imgrefurl=http://www.justinsokolowski.net/&h=95&w=95&sz=31&hl=en&start=4&um=1&tbnid=8QMsDOH5nTCixM:&tbnh=80&tbnw=80&prev=/images%3Fq%3Danimated%2Bblinking%26svnum%3D10%26um%3D1%26hl%3Den%26rls%3DGGLB,GGLB:1969-53,GGLB:en%26sa%3DNhttp://images.google.com/imgres?imgurl=http://www.eyethinkinc.com/rulers/images/blinkingeyes.gif&imgrefurl=http://www.eyethinkinc.com/rulers/blinkingeyes.html&h=148&w=416&sz=34&hl=en&start=58&um=1&tbnid=AmuUAWlJKeLVwM:&tbnh=44&tbnw=125&prev=/images%3Fq%3Danimated%2Bblinking%26start%3D40%26ndsp%3D20%26svnum%3D10%26um%3D1%26hl%3Den%26rls%3DGGLB,GGLB:1969-53,GGLB:en%26sa%3DNhttp://i81.photobucket.com/albums/j215/Oblivion_fan/Animatedflames.gif
Functions ContinuedCauses heart beatDirects circulation of blood
Regulates blood pressureSends blood to different areas of the
body
5http://images.google.com/imgres?imgurl=http://acousticheart.com/library/HeartBeatingAnimation.gif&imgrefurl=http://acousticheart.com/learning_heart_and_lung_sounds.html&h=155&w=150&sz=59&hl=en&start=41&um=1&tbnid=XTtO99cxr5BobM:&tbnh=97&tbnw=94&prev=/images%3Fq%3Dbeating%2Bheart%2Banimation%26start%3D40%26ndsp%3D20%26svnum%3D10%26um%3D1%26hl%3Den%26rls%3DGGLB,GGLB:1969-53,GGLB:en%26sa%3DNhttp://www.websystem2.com/images/Migraine_Brain_animated.gifhttp://www.economy-class.co.uk/images/anim_flow_slow_veinstockings_ec.gif
Functions ContinuedProvides movement of internal organsMoves
food through digestive tractEnables bladder controlCauses
involuntary actionsReflex actions Adjusts opening of pupilsCauses
hair to stand on end:
goosebumps.6http://bimari-jankari.mla.iitk.ac.in/image/dsanim.gifhttp://www.visionsource-arenaeyeworks.com/images/Wild%20Eyes%20-%20animated.gifhttp://www.search.com/reference/Goose_bumpshttp://www.ebcl.lib.id.us/ebcl/images/goosebump.gifTypes
of Muscle TissueThere are three main types of muscle
tissueSkeletal(striated)Cardiac(heart)Smooth(visceral)
7Comparison of Muscle TypesMuscle TypeCardiacFunctionMovement of
boneWalls of internal organs + in skinLocationAttached to
boneHeartSmoothSkeletalControl ModeBeating of
heartInvoluntaryInvoluntaryMovement of internal
organsVoluntary8Muscle Movement______- Muscle that bends the joint
when contracted.________- Muscle that straightens the joint when
contracted.__________ muscleis short, firm, tight and thicker
around._______ muscle is stretched, long, loose and thinner
around.
FlexorExtensorRelaxedContracted9http://images.google.com/imgres?imgurl=http://www.biologycorner.com/resources/skeleton_labeled.gif&imgrefurl=http://www.biologycorner.com/bio3/notes-skeletal.html&h=618&w=380&sz=51&hl=en&start=13&um=1&tbnid=aq-CQEfXs3gfQM:&tbnh=136&tbnw=84&prev=/images%3Fq%3DSkeletal%2BDivisions%26svnum%3D10%26um%3D1%26hl%3Den%26rls%3DGGLB,GGLB:1969-53,GGLB:en%26sa%3DN
Interesting Facts About MusclesMuscles are bundles of cells and
fibers. Muscles work in a very simple way. All they do is tighten
up--that is, contract--and relax. You have two sets of muscles
attached to many of your bones which allow them to move. There are
630 active muscles in your body and they act in groups. Muscles can
only pull. They never push.
The End!