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Download MUSCLES - Willis ISD
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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.
