what is a cell wall and work

Dear Student,

Cell wall is the outer most layer surrounding the cells of plants, fungi and bacteria. The cell wall provides rigidity, additional protection and structure to the plant cell. Animal cells lack cell wall. In plant cells, cell wall is made up of cellulose, while in fungi it is composed of pectin. Bacterial cell wall is composed of a complex substance called peptidoglycan.
It provides the cell with both structural support and protection. 

Regards