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Year 10 PASS Skeletal System

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by

Mr Mirza

on 8 March 2016

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Transcript of Year 10 PASS Skeletal System

The Skeletal System
Axial/Appendicular Skeleton
Types of Bones
Bones come in a variety of shapes and have a complex internal and external structure, allowing them to be lightweight yet strong and hard, while fulfilling their many other functions.
There are 4 types of bones in the human body: long, short, flat and irregular.
Long Bones
Short Bones
Flat Bones
Irregular Bones
Types of Joints
A joint is a place where two or more bones meet. Just about every bone in the body forms at least one joint with another bone. Joints can allow movement, but they can also provide stability.
There are 3 types of joints-
Fixed (immovable)
Cartiliginous (slightly movable)
Synovial (freely movable)
Fixed Joints
Cartiliginous Joints
Synovial Joints
Synovial Joints
Ligaments - are fibrous bands that connect bones.
They are designed to assist in maintaining stability
in the joint by restraining excessive movement, but can
also control the degree and direction of movement that
occurs.

Tendons - are tough, inelastic cords of connective tissue that attach muscle to bone.

Synovial Fluid - acts as a lubricant, keeping the joint well oiled and the moving surfaces apart. As no two joint surfaces fit together perfectly, synovial fluid forms a fluid cushion between them. It also provides nutrition for the cartilage.

Cartilage - covers the end of the two meeting bones so that they slide smoothly over each other.
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