All
animals
need
to
eat
____________________
to
get
____________________
to
live
.
But
in
order
to
use
this
food
,
they
have
to
break
it
down
in
a
process
called
____________________
.
And
so
,
all
animals
have
a
group
of
connected
organs
called
the
digestive
____________________
.
In
humans
,
the
process
of
digestion
begins
in
the
____________________
where
the
food
is
____________________
into
small
pieces
by
the
teeth
.
The
____________________
helps
by
moving
these
pieces
around
.
These
pieces
are
covered
by
____________________
,
or
spit
.
The
saliva
makes
the
food
slippery
so
that
it
is
easier
to
____________________
.
It
also
helps
to
break
down
the
food
.
Once
the
food
is
swallowed
,
it
passes
through
the
____________________
,
which
is
like
a
gate
that
sends
food
into
the
and
air
into
the
lungs
.
The
food
travels
down
the
esophagus
and
into
the
____________________
.
Once
in
the
stomach
the
food
is
mixed
with
ACID
and
crushed
some
more
.
After
spending
some
time
in
the
stomach
,
the
food
is
sent
into
the
____________________
____________________
where
nutrients
are
____________________
.
The
____________________
helps
by
producing
some
digestive
juices
call
bile
.
Next
,
the
remaining
food
goes
into
the
____________________
____________________
where
the
____________________
are
absorbed
.
The
remaining
food
is
called
____________________
and
it
is
pushed
into
the
____________________
where
it
waits
before
leaving
the
body
.
