MUSCLES http://www.schwarzenegger.com/en/life/retroclip/retro_en_arn_hanzfranz.asp?sec=life&subse c=retroclip
MUSCLEShttp://www.schwarzenegger.com/en/life/retroclip/retro_en_arn_hanzfranz.asp?sec=life&subsec=retroclip
Involuntary MusclesInvoluntary 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.