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Physical Education
Structure and Function
Question | Answer |
---|---|
What is a skeleton? | The framework of bones which gives shape and support to the body. It also protects the internal organs like the heart and lungs. |
What is a joint? | It is where two or three bones meet, and allow the skeleton to move. |
Which joints allow free movement? | Ball and socket joint and hinge joint. |
What do muscles do? | The muscles of the body allow movement to occur at joints. These muscles are known as Skeletal muscles. |
Which muscles control the elbow? | The triceps and the biceps muscles control the elbow. The bicep contracts or shortens, pulling the lower arm up, and causing the elbow to bend. The triceprelaxes or lengthens.To straighten the elbow the opposite occurs. |
Which muscles control the knee? | The hamstring and the quadricep muscles control the movement of the knee. The hamstring contracts, pulling the lower leg up and causing the knee to bend. At this time, the quadricep relaxes. |
What are ligaments? | Strong bands which connect bones to bones at the joint. |
What are tendons? | Tendons are strong strips which attach the muscles to bones. |
What is cartilage? | Cartilage is a soft cushioning substance which covers the ends of the bones. |