There are various methods that are used by the plants to get rid of their waste products:

(i) Gaseous waste products are thrown out through the stomata, present on leaves and lenticels, present on stem of the plants.

(ii) Solid and liquid wastes are thrown out by shedding off leaves, peeling of bark and falling of fruits.

(iii) Plants excrete some waste products into the soil around them.

(iv) By secreting gums and resins.