●In Anatomy & Animal body parts:
A
or
a
or
and
two environments.
A
,
,
part that can
or
when
by an
force.
A
or
or
whose
is to exclude water.
●In Anatomy, Animal body parts & Biology:
A
or
a
or
and
two environments.
A
double
of
and
the
of cells or organelles.