The Skeletal System

1
The Skeletal System

• The Thoracic Cage

2
Axial Skeleton

• Consists of
• Skull
• Vertebral column
• Thoracic cage

3
Thoracic Cage

• Consists of
• 12 pair of ribs
• sternum

4
Thoracic Cage
5
Thoracic Cage
6
Ribs

• True ribs
• articulate posteriorly with thoracic vertebrae
• Articulate anteriorly directly with sternum via
  costal cartilage
• Ribs 1 7

7
Thoracic Cage
8
Ribs

• False ribs
• Articulate posteriorly with thoracic vertebrae
• Do not articulate with sternum
• Articulate with costal cartilage above
• Ribs 8 12
• Ribs 11 12 are floating ribs
• No anterior articulation

9
Thoracic Cage
10
Structure of Rib

• Head
• Neck
• Tubercle
• Angle
• Costal
• groove
• 6. Body