Where does the growth of nails occur?

Nail growth occurs primarily in the nail matrix, which is the tissue located underneath the base of the nail. This area is responsible for the production of new nail cells. As these cells divide and grow, they push older cells forward, resulting in the nail extending outward. The nail matrix is crucial for maintaining the health and proper growth of nails.

While the epidermis is the outer layer of skin that forms the protective barrier, it does not contribute to the actual growth of nails. The dermis provides structural support to the skin and contains blood vessels and nerves but does not directly contribute to nail production. The lunula, the visible white crescent at the base of the nail, is part of the matrix but does not denote the location where growth occurs; rather, it is a portion of the matrix that can sometimes be seen through the nail. Thus, the primary site of nail growth is undoubtedly the matrix.