Muscular System

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Muscular System
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Muscle Facts

• There are over 600 muscles in the human body.
  Some are small and delicate while others are
  large and sturdy.
• Muscles make up between 25 to 45 percent of your
  body weight.
• Muscles are made up of cells called muscle
  fibers.
• Lifting weights can make muscle fibers grow or
  increase in number.
• There are over 30 muscles in the face that allow
  you to smile, frown, look surprised, and much
  more.

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3 Types of Muscles

• Skeletal
• Cardiac
• Smooth

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Tendons

• Attach muscle to bone

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Skeletal Muscle Fibres

• Slow twitch
• Fast twitch

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• http//www.youtube.com/watch?vhBNo1jj1h54 -
  Suh

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Building Muscle

• Working muscles causes micro-tears in fibers
• They heal in two ways
• Thicker than before
• Multiplication

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Anabolic Steroids
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• http//www.youtube.com/watch?vgrQR3_oqkKQ -
  Dangerous Effects of Anabolic Steroids
• 100 530, 1520 - 2110, 2343 2700,