The
____________________
is
the
hardest
,
white
outer
____________________
of
the
____________________
.
The
____________________
is
a
layer
underlying
the
enamel
.
It
is
made
of
living
____________________
,
which
secrete
a
hard
mineral
____________________
.
The
____________________
is
the
softer
,
living
inner
structure
of
____________________
.
____________________
vessels
and
nerves
run
____________________
the
____________________
of
the
teeth
.
The
____________________
is
a
layer
of
connective
____________________
that
binds
the
roots
of
the
teeth
____________________
to
the
____________________
and
jawbone
.
The
____________________
____________________
is
a
tissue
that
helps
hold
the
____________________
tightly
against
the
jaw
.
