TOPIC 05:EXCRETION
This is a process of getting rid of waste products from the body of living organism formed during metabolic process. Metabolic process includes all chemical reactions taking place inside living system. Example; respiration
During the process of respiration, carbon dioxide is one of the products. Therefore carbon dioxide is known as excretory product and the organs that get rid of them are called excretory organs.
Example
IMPORTANCE OF EXCRETION
It is important that all unwanted products be removed from the body of a living organism, because if they are allowed to remain in the body, they would soon become harmful and poisonous to the living.