Distinguishing the Axial and Appendicular Skeleton
Let's dive into how our skeleton is organized into two main divisions: the axial and appendicular skeleton. Think of it as nature's way of creating a framework that's both sturdy and flexible!
The Axial Skeleton
The axial skeleton forms the central core of our body and includes:
Skull (cranium and facial bones)
Vertebral column (spine)
Sternum (breastbone)
Ribs
Think of the axial skeleton as your body's central "axis" – it's the core structure from which everything else extends!
Key characteristics of the axial skeleton:
Protects vital organs (brain, heart, lungs)
Provides central support for the body
Contains 80 bones in total
Maintains vertical posture
The Appendicular Skeleton
The appendicular skeleton consists of the bones of our appendages (limbs) and their connecting girdles:
Upper limbs (arms)
Humerus, radius, ulna
Carpals, metacarpals, phalanges
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