Muscles and Body Movement

1
Muscles and Body Movement

• Objectives
• The student will define and apply the principles
  of body motion.
• The student will define and discuss the three
  different types of muscle tissue.
• The student will define and understand the
  difference between involuntary muscle and
  voluntary muscle.
• SOLs 9.1, 9.1b, 9.1d, 9.1e, 9.1f, 9.1g 9.2,
  9.2a, 9.2c, 9.4, 9.4a, 9.4b

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Book Assignment (pg. 380)

• What are the Ten guidelines I can follow to
  prevent physical activity related injuries?
• What does RICE stand for Describe each
  principle(pg.745) New book pg. 35.
• Complete and turn in

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Muscular System

• Your body has three basic types of muscle tissue
• Smooth muscle
• Skeletal muscle
• Cardiac muscle

4
Cardiac muscle

• This is a special type of tissue that forms the
  wall of the heart.
• This muscle pumps blood through your
  cardiovascular system.
• Cardiac muscle is an involuntary muscle, meaning
  they work without a persons conscious control.

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Smooth muscle

• Smooth muscles are located in place such as the
  intestines and blood vessels.
• Smooth muscles are involuntary muscles.

6
Skeletal muscle

• Skeletal muscles are attached to your bones and
  cause body movement.
• Skeletal muscles are voluntary, meaning they are
  under conscious control.
• Skeletal muscles account for 40-50 of your
  total body weight.

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Flexion

• This means bending or folding.
• Flexor muscles generally curl the body forward
  into the fetal position.

8
Extension

• This means stretching out, the opposite of
  flexion.
• Extensor muscles stretch the body as in bending
  backwards with your arms over your head.
• Like waking up in the morning and stretching.

9
Abduction

• This means drawing away
• In body terms, it is a movement to the side as in
  lifting your arm or leg away from your body when
  you step to the side or reach out to the side.

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Adduction

• This means drawing inward
• A sideways motion opposite to abduction as in
  bringing an arm or leg back towards the center of
  the body.
• If you were a soldier it would be the movement
  from "at ease" to "attention" bringing both legs
  together.

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Rotation

• This means turning around, like a wheel. It means
  movement around the axis of a bone like the
  movement of your head when you look from right to
  left or the movement of your hand and wrist when
  you use a screwdriver.

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• Basic Facts
• Flexors and extensors work in opposition.
• Abductors and adductors work in opposition.
• Rotation uses muscles that work in combination.

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THE END!!