Hi
!
I'm
____________________
this
very
interesting
____________________
about
the
human
____________________
.
We
don't
learn
a
lot
about
it
in
____________________
lessons
in
the
school
.
I
have
read
about
____________________
in
our
bodies
,
we
have
millions
or
trillions
of
helpful
bacteria
in
us
.
Animals
need
bacteria
to
____________________
food
.
We
have
70
octillion
cells
in
our
body
.
