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The Skeletal System

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by

Robert Williford

on 7 May 2014

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Transcript of The Skeletal System

Skeletal System
The Skeletal System
Skeletal system - bones, cartilage, and the special structures that connect them.

Your bones are alive and growing just like the other organs in your body. They have many important functions such as:
1. providing structure and support for muscles to connect to.
2. Along with the muscular system they allow movement.
3. Storage of minerals and fat.
4. Production of red blood cells.
What is a Bone?
There are two different types of bone tissue.

Compact Bone - bone tissue that does not have any visible open spaces.

Spongy Bone - bone tissue that has many open spaces. It provides much of the support for bone just life the trusses of a bridge.

Marrow - soft tissue inside the bone. Red marrow produces red blood cells. Yellow marrow stores fat.
Growing Bones
The majority of your skeleton started out soft and rubbery. Bones start out as a material called cartilage. When your born your skeleton is made of cartilage. During childhood your skeleton hardens into bone. Parts of the skeleton keep growth plates made of cartilage so your skeleton can continue to grow.
Joints
The place where two or more bones connect is called a
joint
. Muscles connected to bone alone would not allow movement, but different joints allow different types of movement.
Ligaments
Joints are kept together with strong elastic bands of connective tissue called
ligaments
.

If ligaments are stretched too far they become strained. Strains will heal with time.

If a ligament is stretched an extreme amount or in the wrong direction it can tear. A torn ligament will not heal and must be surgically repaired.
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