Nails, which are modifications of the epidermis, are protective
coverings on the ends of the fingers and toes. Each nail consists of a nail
plate that overlies a surface of skin called the nail bed. The whitish,
thickened, half-moon shaped region (lunula) at the base of the nail plate is
the most actively growing region. Nails, like
hair, are primarily dead keratinized cells.
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