Latex, the white sap that flows out of a cut rubber tree bark during extraction, contains toxins that are toxic to the tree.
The characteristics of living things are movement, respiration, nutrition, irritability, growth, excretion and reproduction.
Excretion, one of the characteristics of living things, is the removal of harmful substances from the body of a living thing through specialise organs or organelles like contractile vacuole, skin, stomata, lenticels and kidneys.
The injury on the bark of a rubber tree during extraction serves as an artificial organ of excretion. Latex is similar to urine or sweat carrying harmful waste products out of the rubber plant during rubber tapping.