Ribs are a complex structure that involves both cartilage and bone. While most of the rib is made of bone, the anterior portion of the rib, where it connects to the breastbone (sternum), is made of cartilage known as costal cartilage. This cartilage acts as a flexible connector, allowing the rib cage to expand and contract during breathing.
Here's a breakdown:
- Bone: The main part of the rib is made of bone, providing structural support and protection.
- Cartilage: The costal cartilage connects the ribs to the sternum. This allows for flexibility and movement.
Ribs are crucial for protecting vital organs like the heart and lungs. They also play a role in breathing by allowing the chest cavity to expand and contract.
In summary, ribs are composed of both bone and cartilage, with the cartilage acting as a flexible connector.
