American Academy of Professional Coders (AAPC) Practice Exam

What part of the nail is considered the cuticle?

1. Lunula

2. Eponychium

3. Root

4. Nail plate

The correct answer is: Eponychium

The cuticle is defined as the area of skin at the base of the nail that lies upon the nail plate, specifically known as the eponychium. The eponychium serves an important protective function by covering the area where the new nail growth occurs, preventing bacteria and other pathogens from entering. It is a critical aspect of nail anatomy that contributes to the overall health and integrity of the nail. In contrast, the lunula is the visible white crescent shape at the base of the nail, the root refers to the part of the nail hidden beneath the skin where nail growth begins, and the nail plate is the hard, visible part of the nail itself. Understanding these distinctions helps in accurately identifying parts of the nail and recognizing their roles both in aesthetics and health.