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Year 10 PASS Skeletal System
Transcript of Year 10 PASS Skeletal System
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.
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-
Cartiliginous (slightly movable)
Synovial (freely movable)
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
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.