Nails scratch your itches, and get painted pretty, but seriously, what do they do? Nails are an envelope of dead skin cells surrounding the top parts of fingers and toes. They resemble animals’ hooves in that both are made of a tough protein called keratin (which is the same stuff our hair is made of). In humans, nails serve as a protective plate of the fingers and toes, increase sensation in fingertips, and help us pick things up with our hands. Nails have four main parts: nail plate, nail matrix, nail bed, and nail grooves.
Wednesday, May 25, 2011