All
living
things
have
one
thing
in
common
:
they
can
carry
out
the
____________________
vital
functions
of
____________________
,
____________________
and
____________________
.
There
are
____________________
human
body
systems
that
enable
us
to
carry
out
the
function
of
____________________
:
the
digestive
system
,
the
____________________
system
,
the
____________________
system
and
the
____________________
system
.
