Nails, like hair, grow from the matrix. As older cells grow out, they are replaced by newer ones, they are compacted and take on a hardened form. The average growth rate for nails is 0.1 mm each day; individual rates depend on age, time of year, activity level, and heredity.
Nails serve several important purposes.
They help humans function. –
Nails are basically flat versions of claws that help humans dig, climb, scratch, grab, and more.
They guard against injuries –
They serve as protective plates that help prevent the fingers and toes from getting cut or scraped during daily activities.
They enhance the sensation. –
The fingers and toes contain nerve endings that allow the body to process the volumes of information that it receives every time something is touched—and the nail acts as a counterforce, providing even more sensory input after a person touches something.