When a child experiences a blunt chest injury:

When a child experiences a blunt chest injury:

• A. The rigid ribs fracture easily
• B. The flexible ribs can be compressed without breaking
• C. The sternum always fractures
• D. There is rarely any injury to the chest

Answer: (B)

In children, the chest wall is very flexible because the ribs contain a lot of cartilage and are more compliant than in adults. With blunt impact, the chest can be compressed or deformed without the ribs actually cracking or breaking. That pliability means energy from the impact can be transmitted to internal organs, so serious injuries like lung contusions or pneumothorax can occur even when there aren’t fractures. This is why the best statement is that the flexible ribs can be compressed without breaking. The alternatives aren’t accurate for kids: ribs aren’t typically rigid enough to fracture easily, the sternum isn’t destined to fracture in every blunt impact, and chest injuries can and do occur even without bone fractures.

In children, the chest wall is very flexible because the ribs contain a lot of cartilage and are more compliant than in adults. With blunt impact, the chest can be compressed or deformed without the ribs actually cracking or breaking. That pliability means energy from the impact can be transmitted to internal organs, so serious injuries like lung contusions or pneumothorax can occur even when there aren’t fractures. This is why the best statement is that the flexible ribs can be compressed without breaking. The alternatives aren’t accurate for kids: ribs aren’t typically rigid enough to fracture easily, the sternum isn’t destined to fracture in every blunt impact, and chest injuries can and do occur even without bone fractures.