Explain the construction and working of a dry cell?

a dry cell has many uses. it is basically a battery. a dry cell can be used in torches, clocks, watches, etc. this is the exact definition of a dry cell (from Science Focis 2) "A dry cell is not completely dry, but contains a chemical paste instead of a liquid. As in a wet cell, a chemical reaction generates charge that will flow when the cell is connected to a circuit"