The Skeletal System.

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Presentation transcript:

The Skeletal System

Functions of the Skeleton Support Allows movement Protection

Joints Types of Joints: This is where two or more bones meet. Most joints allow movement to take place. Types of Joints: Fixed / immovable Synovial / freely moveable Gliding joint

1. Fixed joints/ Immovable Where there is no movement between bones –skull.

2. Freely moveable or synovial joints which are of two types: Ball and socket joints which allows movement in all directions – shoulders and hips. Hinge joints which allows movement in one direction only – elbow and knee

Cartilage – protects ends of bones and reduces friction in the joint Cartilage – protects ends of bones and reduces friction in the joint. Synovial fluid – lubricate the joint and allows joint to move more freely.

3. Gliding Joint The bones side across each other Example: Wrist (no diagram needed)

Tendons and Ligaments Tendons – connect muscle to bone. Ligaments – connect bone to bone.

Tendons – connect muscle to bone

Ligaments – connect bone to bone.

Muscles Muscles are protein structures that can contract. They cause bone to move.

Antagonistic Muscles Pairs of muscles which pull in opposite directions to bring about movement – biceps and triceps in arm.

Watch the muscles….

Watch the muscles….

Watch the muscles….

Watch the muscles….