What part of the nail contains lymph, blood vessels and nerves that create cells?

The nail matrix is the correct answer because it is the area located under the base of the nail, where new nail cells are produced. This region contains lymph, blood vessels, and nerves, which are essential for the nourishment and growth of the nail. The cells created in the nail matrix multiply and harden to form the visible part of the nail known as the nail plate. Through this process, the matrix supports nail growth and overall health, making it a crucial component of the nail structure.

The nail bed, on the other hand, is the skin beneath the nail plate that provides support but does not generate new cells. The nail plate refers to the hardened keratin that is visible and extends from the fingertip. The nail fold is the skin that surrounds the sides of the nail plate and protects the matrix, but it is not involved in the cell generation process. Thus, understanding the specific roles of each part clarifies why the nail matrix is the correct choice.