What is the nail matrix and its significance?

• A. The tissue that generates the nail plate; damage can affect growth and appearance.
• B. The hard outer layer of the nail.
• C. The blood supply to the fingertip.
• D. A type of nail disease.

Answer: (A)

The nail matrix is the tissue at the base of the nail that generates the nail plate. It contains living cells that divide and keratinize to form the hard material of the nail. As these cells produce the nail plate, the plate grows outward over the fingertip. Because growth comes from the matrix, any injury, chemical exposure, or illness that affects this tissue can change how the nail grows—altering length, thickness, and surface appearance, and sometimes causing permanent changes if damage is severe. The outer hard nail layer is the nail plate, not the matrix; the blood supply and the nail bed are separate structures, and a disease is not the matrix itself.