Question

The figure given here is of the rib cage. Identify the parts labeled as A, B, and C and select the correct option.

A – Coccyx, B – Ribs, C – Vertebral column.
A – Sternum, B – Ribs, C – Vertebral column.
A – Scapula, B – Ribs, C – Vertebral column.
A – Tarsal, B – Ribs, C – Vertebral column.

Answer 1

Hint:The rib cage provides protection to the vital organs present in the thoracic cavity. It expands when we breathe in and relaxes when we breathe out. The ribs protect our heart and lungs.

Complete answer: The rib cage is the arrangement of ribs attached to the vertebral column at the back and sternum in the front in the thorax of vertebrates. It protects and encloses the heart and lungs. In humans, it is also known as the thoracic cage. It is a bony and cartilaginous structure that encloses inside it, the thoracic cavity. It also supports the shoulder girdle to form the central or main part of the human skeleton. It consists of –
24 ribs that are arranged in 12 pairs
The sternum
The xiphoid process
The costal cartilages
The 12 thoracic vertebrae
So, in the figure, the bone labeled as A refers to the Sternum or the chest bone. The bones labeled as B are the Ribs. The bones labeled as C are the Vertebral column.

So, the correct answer is option B.

Additional information:
The ribs are 12 pairs, of which the first 10 pairs are true ribs. These are attached to the vertebral column at the back and to the sternum in the front. The remaining 2 pairs are called false ribs or floating ribs. They are attached to the vertebral column at the back but not to the sternum in the front.

Note: The rib cage is a structure of a lot of importance for protection to the lungs and heart. The true ribs form the chest cavity. The floating ribs do not contribute to the chest cavity.