JOINTS KS3 Science By Dr H E Bloomfield © HEB.

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Presentation transcript:

JOINTS KS3 Science By Dr H E Bloomfield © HEB

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

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

Immovable Joints © HEB

Movable Joints © HEB

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

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

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

A Typical Hinge Joint © HEB

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

ARTHRITIS © HEB

Arthritis © HEB

Replacement Hip Joints © HEB

Replacement Hip Joints X Rays © HEB

Arthritis in Knees © HEB

Replacement Knee Joints © HEB

Replacement Knee Joints © HEB

Hands with Arthritis © HEB

Hands Deformed by Arthritis © HEB

Hand Joint Replacements © HEB

THE END © HEB