• The skeleton system in the internal framework of the body that provides support , protection and movements .

It is made up of bones and cartilages .

Skeleton system

Composed of :

1. Bones .

   
   

2. Cartilage .

3. Joints .

4. Ligaments .

Classification of bone based on shape .

Bones can be classified into five types based on shape :

1. Long .

   
   

2. Short .

3. Irregular .

4. sesamoid .

The axial skeleton

1. Skull .

2. vertebral column {spinal column } .

3. Thoracic cage .

4. Sternum .