How many cell layers compose the thickness of the elodea leaf which layer has the largest cell?

There are 2 layers, one for each side, similar to a sandwich and the layers are the bread. There are two of them so they can hold together within. 
The primary additional component that plant cells have is a cell divider outwardly. This is for the most part made of cellulose, and it gives an extreme covering outwardly of the phone film. It, subsequently, gives plant cells an unmistakable polygonal framework.