The rib cage, also known as the thoracic cage, is a framework in the chest.
Functions:
Protects vital organs such as the heart and lungs.
Provides attachment points for muscles.
Components of the Rib Cage
Sternum (Breastbone):
Located in the middle of the chest.
Composed of three parts:
Manubrium: The widest part at the top.
Body: Located in the middle.
Xiphoid Process: Located at the bottom.
Ribs:
Total of 12 ribs:
True Ribs (1-7):
Connect individually to the sternum via cartilaginous extensions called costal cartilages.
False Ribs (8-12):
Do not connect directly to the sternum.
Ribs 8-10: Fuse with the costal cartilage of rib 7.
Floating Ribs (11-12): Do not connect with the sternum at all.
Thoracic Vertebrae:
Form the thoracic curvature in the vertebral column.
Each rib articulates with its corresponding vertebra:
E.g., Rib 11 articulates with vertebra T11.
Some ribs, like Rib 9, also articulate with the vertebra above (e.g., T8).
Summary
The rib cage structure includes the sternum, ribs, and thoracic vertebrae, all playing critical roles in protection and support within the thoracic region.