Muscular System. Muscle Function Movement Not moving “freeze” Holding still Posture Sitting...
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Transcript of Muscular System. Muscle Function Movement Not moving “freeze” Holding still Posture Sitting...
Muscular System
Muscle Function Movement
Not moving “freeze” Holding still
Posture Sitting Standing
Body heat Causes sweating Shivering
Types of Muscle tissue Striated
Aka Skeletal muscles Voluntary muscles Muscles of
movement Makes up the bulk of
the muscle of the body Example
Biceps Triceps
Striped in appearance (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.