The
skeletal
system
consists
of
the
____________________
and
the
____________________
,
ligaments
,
and
____________________
associated
with
the
bones
.
It
accounts
for
about
____________________
of
the
body's
weight
.
Bones
are
rigid
structures
that
form
the
____________________
for
the
body
.
People
often
think
of
bones
as
dead
,
dry
inert
pipes
and
plates
because
that
is
how
they
are
seen
in
the
laboratory
.
Actually
,
the
living
bones
in
our
bodies
contain
____________________
tissues
that
consume
____________________
,
require
a
____________________
supply
,
use
____________________
and
discharge
____________________
products
in
____________________
,
and
change
shape
or
____________________
in
response
to
variations
in
mechanical
stress
.
The
skeletal
system
is
strong
but
lightweight
.
It
is
well
adapted
for
the
functions
it
must
perform
.
It
is
a
masterpiece
of
design
.
