Final answer:
The statement that the eponychium is more commonly called the cuticle is true. The eponychium is a critical part of the nail structure, acting as a protective barrier, and nails are composed of a protein called keratin.
Step-by-step explanation:
True or False: The eponychium of a nail is more commonly called the "cuticle." The correct answer is true. The eponychium, also known as the cuticle, is the nail fold that meets the proximal end of the nail body. It is an important part of the nail anatomy because it provides a protective barrier, preventing pathogens from entering and causing infection.
Nails are mainly composed of a protein called keratin. This protein is also the primary component of hair and the outer layer of skin. The matrix at the root of the nail is responsible for the production of keratinocytes, which make up the nail plate or nail body.