On some parts of the body the hairs are coarse and long; on other parts they are fine and short.
~10.~ Many of the ducts leading from the oil glands open into the pockets or pouches from which the hairs grow.

The oil makes the hair soft and glossy.

Nature has thus provided an excellent means for oiling the hair.
~11.~ The hair is chiefly useful as a protection.

It is also an ornament.
~12.

The Nails.~--The nails of the fingers and the toes grow out of little pockets in the skin just as the hairs do.