To better understand fibrosarcoma, it helps to understand the anatomy of the skeleton and bone.

The bony skeleton is a living structure that supports the entire body. Bone made up of an outer shell of cortical, or very dense, bone that surrounds a honeycomb-like structure of softer (cancellous) bone. Bone mainly consists of protein and calcium. Without calcium, bone will become weak.

The human skeleton can be divided into two sections:

• Axial skeleton: a total of 80 bones including the skull, spine, and chest
• Appendicular skeleton: a total of 126 bones including the pelvic girdle, limbs, feet and hands

Anatomy examples:

• Internal structure of bone
• The pelvic girdle
• The chest
• The skull
• The spine
• Skeletal system
• Hands and wrists
• Feet