Transcript What the skeletal system does for you

8th grade Health Unit
Muscles and Skeletal Systems
Bell Ringer
Pick up and complete the Saved by
the skeleton worksheet.
Front and back
• 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
Connective tissue:
• Cartilage- strong, flexible tissue that
cushions joints ex. knee
Ligaments-connect bones to
bones ex. Acl
Tendon-connect muscle to
bones ex. Achilles
How muscles Work
• Two basic
actions
account for
all muscle
movement.
• Extension- the
lengthening of
muscle fibers
and contractionis the shortening
of muscle fibers.
Cranium
Humerus
Scapula
Radius
Ulna
Mandible
Clavicle
Ribs
Vertebrae
Pelvis
Phalanges
Femur
Petella---------Fibula
Tibia
Phalanges
Muscular System
• The body is composed of over 600 muscles
• Muscular System-group of tough tissue that makes
your body parts move
•3 Kinds of Muscle:
•A.Skeletal-attached to bones that enable you to
move (voluntary)
•B.Smooth- the muscles found in the
organs, blood vessels, and glands
(involuntary)
•
•C.Cardiac- found only in the walls of the
heart (involuntary)
Voluntary and Involuntary
• Voluntary Contraction
• Involuntary Contraction
• Striated muscle that can • You cannot control the
be controlled
movement. You breathe
voluntarily.... meaning
on your own and your
you control the muscles
heart beats on its own.
that you want to
Another would be a
move... arms legs
myospasm meaning a
fingers... ect
muscle spasm.
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
coughing
What 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
Pectoral
Deltoid
Biceps
Rectus
abdominus
brachioradialis
Quadriceps
Sartorius
Tibialis
Deltiod
Triceps
Trapizus
Latissimus dorsi
Gluteus
maximus
Hamstring
Gastrocnemius
Soleus (side of
claf muscle)
VIDEO
• http://10.197.3.241/SAFARI/montage/play.ph
p?keyindex=36251&location=005849
• Safari Montage- Bones and Muscles- 22min.