Consists of cellulose microfibrils running through a matrix of other complex polysaccharides.
It is mainly composed of the middle lamella, primary, and secondary cell walls.
Middle lamella is made up of pectates of calcium and magnesium.
Plasmodesmata, linking the cytoplasm of an adjacent plant cell, is present in the cell wall. It encloses tubular extension of ER celled desmotubules.
Plasmodesmata from channels for controlled passage of small-sized particles between adjacent cell s well as the transfer of some specific signals.

6.5.1 Functions of cell wall

It provides mechanical support and protection.
Prevents osmotic bursting of the cells.
Pathway for the movement of water and mineral salts.
Cement neighboring cells together.
Provides protoplasmic continues called symplast for the transport of substances between cells.

Cell Wall