2008年5月17日 星期六

CE Biology:the degrees of movement of vertebral column and a joint in relation to their structure

Compare the degrees of movement of vertebral column and a joint in relation to their structure?


(6 marks)

Vertebral column is made up of many pieces of vertebrae.

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Intervertebral discs lie between adjacent vertebrae in the spine. Each disc forms a cartilaginous joint to

1

allow slight movement of the vertebrae, and acts as a ligament to hold the vertebrae together.

1

A joint is a junction where two or more bones meet together.

1

At the joint, the bones are held together by tough sheets of elastic fibres called ligaments.

1

As they are elastic, the bones can moved with a larger degree of movement in a controlled way at the joint.

1

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