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Muscles

Muscles. Chapter 18-2. What is a muscle?. An organ that can relax and contract to allow movement Attach to bones by tendons More than 600 in our bodies Smallest in our ears ( stapedius ) Largest in our thighs ( sartorious ). How do muscles work?. Works with your skeletal system.

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Muscles

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  1. Muscles Chapter 18-2

  2. What is a muscle? • An organ that can relax and contract to allow movement • Attach to bones by tendons • More than 600 in our bodies • Smallest in our ears (stapedius) • Largest in our thighs (sartorious)

  3. How do muscles work? • Works with your skeletal system. • Work by contracting or shortening. • Work in pairs- one muscle contracts, the other relaxes • Get the energy needed for movement from glucose.

  4. Voluntary vs. Involuntary • Voluntary muscles: you can control • Ex: arms, legs • Involuntary muscles: you do not consciously control • Ex: heart, lungs, digestive tract

  5. Types of Muscle • Skeletal- voluntary; striated; attached to bones to help us move. • Smooth- involuntary; non-striated; make up internal organs • Cardiac- involuntary; striated; found only in the heart to help it beat.

  6. Taking care of your muscles • Exercise-helps cells grow in size • Warm up/stretch-increases blood flow to help muscle be more flexible • Well balanced diet (especially protein)

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