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.