Cell Wall. Most commonly found in plant cells Supports, protect and controls the movement of materials in and out of the cell It is a barrier between cell and its environment Gives rigidity to the cell. Cell Wall. There are several layers in plant cell walls:. Cell Wall.
The middle lamella, a layer rich in pectins. This outermost layer forms the interface between adjacent plant cells and glues them together.
2) The primary cell wall, generally a thin, flexible and extensible layer formed while the cell is growing.
3) The secondary cell wall, a thick layer formed inside the primary cell wall after the cell is fully grown. It is not found in all cell types.
1.) Size of molecules
2.) Whether they are already concentrated either on the side or outside of the cell
1.) Supports, protect and controls the movement of materials in and out of the cell
2.) Gives rigidity to the cell