7.2 Divisions of Human Skeleton

The human skeletal system consists of 206 bones which are primarily divided into two divisions: the axial skeleton and the appendicular skeleton.

Definition

Human Skeleton: Human skeletal system consists of 206 bones which are primarily divided into two division i.e., axial skeleton and appendicular skeleton.

Axial Skeleton: Axial skeleton includes those skeletal parts which are present along the central axis of the body, like skull, vertebral column and rib cage.

Appendicular Skeleton: Appendicular skeleton includes those skeletal parts which are present in appendages (arms and legs). These are pectoral girdle, pelvic girdle, forelimbs and hind limbs.

Main Idea

• Human skeletal system consists of 206 bones.
• Primarily divided into two divisions:
• Axial skeleton includes:
• Skull
• Vertebral column
• Rib cage
• Appendicular skeleton includes:
• Pectoral girdle
• Pelvic girdle
• Forelimbs
• Hind limbs

Core Concept

• 206 bones = total in human skeleton
• Axial skeleton = central axis; skull, vertebral column, rib cage
• Appendicular skeleton = appendages; pectoral girdle, pelvic girdle, forelimbs, hind limbs
• Axial skeleton = 80 bones
• Appendicular skeleton = 126 bones

Detailed Explanation

Divisions of Human Skeleton

Human skeletal system consists of 206 bones which are primarily divided into two divisions i.e., axial skeleton and appendicular skeleton.