Wood
is
a
____________________
vegetable
material
.
It
comes
from
the
____________________
of
trees
and
____________________
It's
composed
of
:
-
____________________
fibres
,
like
all
vegetable
matter
-
____________________
,
which
makes
it
____________________
and
hard
The
parts
of
a
____________________
trunk
you
see
whe
you
make
a
____________________
cut
:
-
____________________
,
exterior
layer
:
it
protects
the
plant
from
____________________
attack
-
Cambium
,
a
thin
____________________
layer
-
Sapwood
,
not
____________________
strong
,
used
for
woodwork
that
needs
____________________
wood
-
Heartwood
,
hard
and
____________________
,
extracted
and
____________________
for
all
types
of
woodworking
-
____________________
,
the
centre
of
the
trunk
,
very
weak
,
____________________
generally
use
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