How do leaves of plants help in excretion ?

Explanation

The leaves help in excretion as given below
(a) Gaseous waste of respiration and photosynthesis `(CO^(2)` water vapour) are removed through the stomata in leaves.
(b) Many plants store waste materials in the vacuoles of mesophyll cells and epidermal cells. Whan older leaves fall , the waste materials are excreted along with the leaves.