Question

define excretion in human body and plants

Answer 1

Excretion is the process by which metabolic waste is eliminated from an organism. In vertebrates this is primarily carried out by the lungs, kidneys and skin. ... Excretion is an essential process in all forms of life. For example, in mammals urine is expelled through the urethra, which is part of the
excretory system.

Answer 2

the main excretory parts of human being are lungs & kindey
lungs exerted carbon dioxide & kindney excrete urine & waste material of the body
in plant the main excretory material are resin,gum, carbon dioxide and water vapour