Joints

Muscles and Joints

What is a joint?

A joint is the place where bones meet.​

Bones themselves cannot move but the muscles they are attached to by tendons can.

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​How do bones move?

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• ​The bone acts like a hinge.

• ​180 degree movement possible.

• Movement only in one plane.​

​​Hinge Joint

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• ​Bone is shaped like a hemisphere.

• Allows movement in more than one plane.

• 360 degree movement.​

​​Ball and Socket Joint​

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​There are two main types of joints.

Multiple Select

Which of these is a ball and socket joint?

• elbow joint

• hip joint

• shoulder joint

• knee joint

Multiple Select

Which of these is a hinge joint?

• Hip joint

• Elbow joint

• Ball and socket joint

• Knee joint

Multiple Choice

Which joint is this?

• Fixed

• Ball and socket

• Hinge

Multiple Choice

Which joint is this?

• Ball and socket

• Hinge

• Fixed

Multiple Choice

Which joint is this?

• Shoulder joint

• Hip joint

• Knee joint

• Elbow joint

• ​Biceps contract.

• Triceps relax.​

​Raised arm​

• ​Biceps relax.

• Triceps contract.​

Lowered arm

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Antagonist muscles

Multiple Select

What happens when the arm is lowered?

• Biceps contract

• Biceps relax

• Triceps contract

• Triceps relax