Massachusetts Wildlife Rehabilitator Practice Exam

What is the purpose of a callus in a biological context?

1. To provide insulation for young animals

2. To mend a fractured bone

3. To signify an area of infection

4. To aid in the locomotion of injured animals

The correct answer is: To mend a fractured bone

A callus serves an important role in the healing process of injuries, particularly fractures. In a biological context, a callus refers to the fibrous tissue that forms at the site of a fracture or bone injury. When a bone is fractured, the body initiates a healing response that involves the formation of a callus to stabilize and unite the broken pieces of bone. This callus consists of collagen and cartilage initially, which eventually mineralizes and becomes bone, facilitating the repair of the fracture over time. The formation of a callus is crucial because it provides a scaffold that allows the body to regain stability in the affected area, ensuring proper alignment and healing of the bone. This process not only signifies that the body is responding to the injury but is also essential for restoring function and strength to the bone after a fracture.