A wall is a tough protective boundary around a structure but it can have some door like opening to pass through. As wall is around a cell that's why it is called cell wall. In this way a tough...
The cell wall is the outer coating of the cell. It protects the cell from any unwanted materials from coming in.
Animal cells have cell membranes rather than cell walls. Only plant cells have cell walls.
Making sure the cell doesn't burst by absorbing too much water.
Plant cells have cell walls.