Elaborate on the given question with a full explanation.
 
What plant structures help in the removal of waste materials?
Answer variants:
shedding
lenticels
Removal of wastes via circulatory system and lungs
xylem tissues
crystals
stomata
a. Excess water is removed from plants through tiny pores called
.
b. Gaseous wastes are also removed through
present on woody stems.
c. Waste substances may be stored in old
.
d. Some wastes are stored in leaves and removed by
.
e. Toxic wastes may be converted into harmless substances and stored as
.