a cell wall is a part of a plant cell for supporting and protecting the cell membrane
plant_cells has cell_wall plant_cell_wall is not cell_wall. bacterial_cell_wall is not cell_wall. cell_wall is not cell_part. cell_wall is cell_plate_material. cell_wall is cell_part. plant_cells has not cell_wall plant_cell_wall is cell_wall. bacterial_cell_wall is cell_wall. cell_wall is layer.