What are those little half moons in your nails?

anatomy of a nail

The pale half moon shape at the base of each nail is called the lunule.  It shows where the hardening process is not yet complete.

The American Academy of Dermatology provided these nail facts:

Nails grow about 0.1 mm (or about .004 inch) per day.
Fingernails tend to grow a little faster than toenails.
Toenails are approximately twice as thick as fingernails.
In general, nails tend to grow faster in summer than they do in winter.
Men’s nails usually grow faster than women’s nails.
Nails on your dominant hand tend to grow faster.

Text from: Why do Men Have Nipples? by: Mark Leyner and Billy Goldberg, M.D.

Image: Getty Images