Completar Frases Nail CompositionVersión en línea Take this quick quiz to see if you remember what you read. por Rosalind Carter 1 15 keratin onyx integumentary rigid 25 flexible firm The natural nail is part of the system . The is the hard protective plate composed mostly of . A normal healthy nail is but . The water content of a nail is between and percent . The lower the water content , the more the nail .
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