Transcript MUSCLES - Willis ISD

MUSCLES
http://www.schwarzenegger.com/en/life/retroclip/retro_en_arn_hanzfranz.asp?sec=life&subsec=retroclip
Involuntary Muscles
Involuntary
Muscles
Muscles that are not
under your conscious
control.
Examples - heart,
muscles used for
breathing
Voluntary Muscles
• Muscles that are under your
conscious control.
• Examples – smiling, turning
a page in a book, and
standing up.
Skeletal
• Are attached to the bones of your
skeleton and provide the force
that moves your bones.
• They are Striated
• Striated - banded
Smooth
• Involuntary muscles such as
those in your stomach that aid in
digestion.
Cardiac
• Found in your heart.
• It is involuntary, and striated.
Contraction
• Muscle cells can only contract,
not extend , so skeletal muscles
must work in pairs.
• While one contracts the other
muscle relaxes to its original
length.
Exercise
• Exercise makes muscle cells
grow in size. As a result, the
whole muscle becomes thicker,
and therefore stronger.
Tendons
• Tendons are strong connective tissue that
connect muscle to bone.