Which part of the nail is visible and made of hardened keratin?

• A. The nail bed
• B. The nail plate
• C. The nail matrix
• D. The cuticle

Answer: (B)

The nail plate is the correct answer because it is the visible portion of the nail, composed primarily of hardened keratin, a protein that provides strength and durability. The nail plate offers a protective covering for the underlying nail bed and contributes to the overall structure and appearance of the nail.

In contrast, the nail bed is the skin beneath the nail plate that supports it but is not visible itself. The nail matrix, located beneath the base of the nail, is where new nail cells are generated, leading to the growth of the nail plate. Lastly, the cuticle is a thin layer of skin that overlaps the nail plate at the base, helping to seal and protect the area between the skin and the nail, but it does not contribute to the hardness or the visible structure of the nail itself. Understanding these distinctions helps clarify the role of each component associated with nail anatomy, reinforcing why the nail plate is the visible part made of hardened keratin.