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© HEB KS3 Science By Dr H E Bloomfield JOINTS. © HEB A joint is anywhere in the skeleton where two or more bones meet.

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Presentation on theme: "© HEB KS3 Science By Dr H E Bloomfield JOINTS. © HEB A joint is anywhere in the skeleton where two or more bones meet."— Presentation transcript:

1 © HEB KS3 Science By Dr H E Bloomfield JOINTS

2 © HEB A joint is anywhere in the skeleton where two or more bones meet.

3 © HEB There are two main types of joint - immovable and movable.

4 © HEB Immovable Joints

5 © HEB Movable Joints

6 © HEB Types of Movable Joint (1) Hinge Joints These allow movement in ONE direction only Examples Elbow, knee, fingers, toes

7 © HEB Types of Movable Joint (2) Ball and Socket Joints These allow movement in ALL directions Examples Hip, shoulder

8 © HEB Structure of a Movable Joint Ligaments hold the bones together and prevent dislocation Did you know? If someone’s ligaments are loose, we say they are double-jointed

9 © HEB Structure of a Movable Joint The ends of the bone are covered in smooth slippery cartilage to reduce friction and stop them wearing away

10 © HEB Structure of a Movable Joint Synovial fluid inside the joint lubricates it and also reduces friction

11 © HEB A Typical Hinge Joint

12 © HEB A Typical Hinge Joint Bone Bone Smooth slippery cartilage to stop bones rubbing Fluid to lubricate joint and reduce friction Strong ligament to hold bones together and prevent dislocation

13 © HEBARTHRITIS

14 Arthritis

15 Replacement Hip Joints

16 © HEB Replacement Hip Joints X Rays

17 © HEB Arthritis in Knees

18 © HEB Replacement Knee Joints

19 © HEB Replacement Knee Joints

20 © HEB Hands with Arthritis

21 © HEB Hands Deformed by Arthritis

22 © HEB Hand Joint Replacements

23 © HEB THE END


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