1. Muscles GCSE PE

2. Types of muscle CardiacCardiac InvoluntaryInvoluntary VoluntaryVoluntary Voluntary muscle Cardiac muscle

3. Muscle types CardiacInvoluntary Voluntary Voluntary Smooth muscle Smooth muscle Found only in the heart Found only in the heart Never fatigues Never fatigues Work automatically Work automatically Smooth muscle Smooth muscle Make up the organs, Make up the organs, blood vessels, blood vessels, intestines intestines Work automatically Work automatically Striated muscle Striated muscle Attach to the skeleton Attach to the skeleton Work under conscious Work under conscious control 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 Muscle Location (where is it found?) Function (what does it do?) Try to remember the names of the bones or joints underneath the muscles

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

9. Compare and contrast Fast twitch 1234 Slow twitch 1234 Fill in what you can and then read page 136 in your text for more ideas

10. Muscles at work Muscles work in pairsMuscles work in pairs Muscles attach to at least two different bonesMuscles attach to at least two different bones Muscles attach to bones via tendonsMuscles attach to bones via tendons Muscles can only pullMuscles can only pull The end of the muscle that is fixed is called the originThe end of the muscle that is fixed is called the origin The end of the muscle that moves is called the insertionThe 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 contracts is called the agonist The muscle that relaxes is called the antagonist

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

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