Download Muscular System

Muscular System
Muscle Function
 Movement
 Not moving
 “freeze”
 Holding still
 Posture
 Sitting
 Standing
 Body heat
 Causes sweating
 Shivering
Types of Muscle tissue
 Striped in appearance
 Striated
 Aka
 Skeletal muscles
 Voluntary muscles
 Muscles of
movement
 Makes up the bulk of
the muscle of the
body
 Example


Biceps
Triceps
 (striated)
 Fascia

Tissue that
separates bands of
muscle fibers.
Types of Muscle tissue
 Cardiac muscle
 Only found in heart
 Looks like striated
muscle
 Involuntary
 Beat (contracts)
w/out conscious
thought
 Forms the walls
of the
 Ventricles
 atria
Types of Muscle tissue
 Smooth Muscle
non-striated
 No stripes
 Involuntary
 Don’t have to
think about
 Found
 Internal organs

 Except heart
 Blood vessels
 Skin
 ducts
Muscle attachment
 Tendon
 Attaches muscle to
bone
 Achilles
 Attaches calf
muscle to heel of
foot.
Muscle attachment
 Muscle origin
 Where muscle
attaches:
 To less moveable
end of the bone.
 More stationary
end of the bone.
 To the end of the
bone closest to
the midline.
Muscle attachment
 Muscle Insertion
Point
 Where muscle
attaches:
 To the more
moveable end of
the bone
 End of the bone
furthest from the
midline
Muscle Action
 Contraction
 Muscle become
 Shorter
 Thicker
 “make a muscle”
in your arm.
 Relaxation
 Muscle becomes
 Longer
 Thinner
 Return to normal
form / shape.
Muscle function!
 Muscles only pull they don’t push.
 Because muscles only create movement
w/ contracting, most work or function in
pairs.
 Antagonistic pairs
 Are the muscles that work together to
create movement.
 Example
 Bicep = pulls in order to bend your arm
 Tricep = pulls in order to straighten your arm
Muscle conditions
 Muscle tissue can be:





Strained
Sprained
Cramped
Inflamed
Spasm
 involuntary muscle contraction
 Atrophy
 Muscle deterioration
Conclusion
 Understanding muscles and how they
work is an important part of your job.
 In dentistry, muscles are related to
chewing, swallowing, facial
expression, and talking.
 Remember you are looked at as the
expert, you should know a little more
than most of your patients.