The
natural
nail
is
part
of
the
____________________
system
.
The
____________________
is
the
hard
protective
plate
composed
mostly
of
____________________
.
A
normal
healthy
nail
is
____________________
but
____________________
.
The
water
content
of
a
nail
is
between
____________________
and
____________________
percent
.
The
lower
the
water
content
,
the
more
____________________
the
nail
.
