What is rib cage? What roles does it play?

Explanation

### Step-by-Step Solution:

1. **Definition of Rib Cage**: The rib cage is a bony structure located in the chest region of the body. It is composed of 12 pairs of bones known as ribs.

2. **Connection to Other Bones**: The ribs are connected to the breastbone, which is also known as the sternum. This connection helps form a protective enclosure for vital organs.

3. **Main Function - Protection**: The primary role of the rib cage is to protect the internal organs, particularly the heart and lungs, from injury.

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