Joints

Question 1

What is a joint?

Answer 1

A joint is when 2 or more bones meet. Joints are important for movement and rotation. All joints allow movement, although the extent of the and freedom of the movement varies from joint to joint.

Question 2

What are the four types of joints?

Answer 2

Condyloid joints
Ball and socket joints
Hinge joint
Pivot joint

Question 3

What movements occur at the pivot joint?

Answer 3

The pivot joint allows bones to rotate. In a pivot joint, one bone shaped like a cylinder rotates inside another bone or ligament.

Question 4

How can a pivot joint aid in sport?

Answer 4

Trying to head a football

Dodging a punch in boxing

Question 5

Whats a hinge joint?

Answer 5

A hinge joint is a joint that only allows backwards and forwards movement.

Question 6

What bones are moving when we flex and extend our knee?

Answer 6

The tibia is hinged on the femur so that the leg can be bent or straightened .

Question 7

Whats the ball and socket joint?

Answer 7

In a ball and socket joint, the rounded head of a long bone (the ball) fits into a cup shaped hole (the socket). Both hip and the shoulder joints are ball and socket joints.

Question 8

Sporting example of using the ball and socket joint?

Answer 8

When a cricketer throws a ball and rotates their arm.

Question 9

Whats a condyloid joint?

Answer 9

A condyloid joint is similar to ball and socket joint, but the ball rests against the end of the bone, rather than inside the socket.

Question 10

An example of a condyloid joint?

Answer 10

The wrist is a condyloid joint. You can bend it (flexion) and straighten it (extension), but you can also turn your hand inwards (adduction) and outwards (abduction).