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Muscles PowerPoint Presentation

Muscles

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Muscles

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  1. Muscles GCSE PE

  2. Types of muscle • Cardiac • Involuntary • Voluntary Voluntary muscle Cardiac muscle

  3. Muscle types Cardiac Involuntary Voluntary • Smooth muscle • Found only in the heart • Never fatigues • Work automatically • Smooth muscle • Make up the organs, • blood vessels, • intestines • Work automatically • Striated muscle • Attach to the skeleton • Work under conscious • control

  4. Structure of skeletal muscle

  5. Muscle groups Can you identify some of the major muscle groups on these drawings?

  6. Now try the ‘Active Challenge’ at the bottom of page 133 in Folens GCSE PE for Edexcel

  7. Muscle table Choose two each from the arms, legs, back & front and any two others Try to remember the names of the bones or joints underneath the muscles

  8. Types of muscle fibre • Fast twitch • Contract quickly • Tire easily • Slow twitch • Contract slowly • Keep going for a long time

  9. Fast twitch 1 2 3 4 Slow twitch 1 2 3 4 Compare and contrast Fill in what you can and then read page 136 in your text for more ideas

  10. Muscles at work • Muscles work in pairs • Muscles attach to at least two different bones • Muscles attach to bones via tendons • Muscles can only pull • The end of the muscle that is fixed is called the origin • The end of the muscle that moves is called the insertion

  11. Muscle pairs in action Antagonistic pairing Right click on the hyperlink to open it in a new window The muscle that contracts is called theagonist The muscle that relaxes is called theantagonist

  12. Now complete ‘Tasks 4 and 5’ on page 135in Folens GCSE PE for Edexcel

  13. Muscle tone • Muscles rarely relax completely • Their constant state of readiness is called muscle tone • Muscle tone helps with maintaining good posture • Good posture is important for general health and also important in many sports • Now read page 137 and complete task 7