● Excess water is removed by the process of transpiration.

● Some of the intracellular waste may get stored in the vacuole or in the leaves which later on are shed.

● Resins and gum are stored in specific resin vacuole or also in xylem.

● Salts and some other by products move out of the stomata by the process of diffusion.

● Dead bark is the dead phleom cells that later act as protective covering also called the "rhytidome".