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hard keratin structures protecting finger and toe tips

Nails are hard, protective coverings made of keratin that grow at the tips of fingers and toes. They serve to protect the sensitive tips of digits and enhance the ability to pick up small objects. In a biological context, nails are considered a part of the integumentary system, which also includes skin and hair.

Related Terms

• Nail Health
• Nail Changes
• Nail Ridges
• Nail Disorders
• Beau's lines
• Nail Involvement
• Brittle Nails
• Nail Damage