The
____________________
is
among
the
most
important
digestive
organs
and
is
located
behind
the
stomach
The
____________________
is
the
heaviest
and
largest
gland
in
the
human
body
and
is
formed
of
four
lobes
.
The
hard
and
soft
palates
form
the
roof
of
the
____________________
and
the
____________________
____________________
pour
their
secretions
into
the
____________________
during
the
oral
phase
of
digestion
.
At
the
____________________
,
the
diameter
of
the
GI
tract
increases
to
form
a
hollow
sac
-
like
structure
made
of
three
layers
of
smooth
muscle
.
These
muscles
are
arranged
in
longitudinal
,
diagonal
and
circular
layers
.
The
____________________
is
among
the
most
important
digestive
organs
and
is
located
behind
the
____________________
.
It
secretes
a
large
number
of
enzymes
,
involved
in
the
digestion
of
carbohydrates
,
fats
,
and
proteins
.
