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8th grade Health UnitMuscles and Skeletal Systems
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Bell Ringer
Pick up and complete the Saved by the skeleton worksheet. Front and back
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• Skeletal system- an internal system made up of bones, joints, and connective tissue
• There are 206 bones in the body.
• What the skeletal system does for you:
• Supports your body• Allows movement
• Protects soft tissue
• Forms blood cells
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Connective tissue:
• Cartilage- strong, flexible tissue that cushions joints ex. knee
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Ligaments-connect bones to bones ex. Acl
Tendon-connect muscle to bones ex. Achilles
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How muscles Work
• Two basic actions account for all muscle movement.
• Extension- the lengthening of muscle fibers and contraction- is the shortening of muscle fibers.
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Cranium
Clavicle
HumerusRibs
RadiusUlna
Phalanges
Femur
FibulaTibia
Phalanges
Scapula
Mandible
Pelvis
Vertebrae
Petella----------
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Muscular System • The body is composed of over 600 muscles
• Muscular System-group of tough tissue that makes your body parts move
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•3 Kinds of Muscle:•A.Skeletal-attached to bones that enable you to move (voluntary)
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•B.Smooth- the muscles found in the organs, blood vessels, and glands (involuntary)•
•C.Cardiac- found only in the walls of the heart (involuntary)
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Voluntary and Involuntary
• Voluntary Contraction• Striated muscle that can
be controlled voluntarily.... meaning you control the muscles that you want to move... arms legs fingers... ect
• Involuntary Contraction• You cannot control the
movement. You breathe on your own and your heart beats on its own. Another would be a myospasm meaning a muscle spasm.
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Your Muscular System• What is a tendonitis? Sometimes the tendons become inflamed for a
variety of reasons, and the action of pulling the muscle becomes irritating.• What is a sprain? Wrench or twist the ligaments of (an ankle, wrist, or
other joint) violently• What is a cramp? A painful, involuntary muscle contraction, typically
caused by fatigue or strain• What is a spasm? A sudden involuntary muscular contraction or convulsive
movement.– A sudden and brief spell of an activity or sensation: "a spasm of
coughingWhat is a hernia? A condition in which part of an organ is displaced and
protrudes through the wall of the cavity containing it• What is a dislocation? Injury or disability caused when the normal position
of a joint or other part of the body is disturbed
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Deltoid
Biceps Rectus abdominus
SartoriusQuadriceps
Pectoral
Tibialis
brachioradialis
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Deltiod
Triceps Latissimus dorsi
Gluteus maximus
Gastrocnemius
Soleus (side of claf muscle)
Trapizus
Hamstring
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VIDEO
• http://10.197.3.241/SAFARI/montage/play.php?keyindex=36251&location=005849
• Safari Montage- Bones and Muscles- 22min.