Cameroon GCE O-Level Biology Practice Questions - Cameroon General Certificate Of Education Ordinary Level Biology (Subject Code 0510) Exam

Excretion is the elimination of undigested dietary fiber through the anus, whereas egestion removes toxic cellular products. Excretion involves only the loss of water vapour through the skin, while egestion is the removal of mineral salts through the kidneys. Excretion is the removal of toxic metabolic waste products formed inside body cells, whereas egestion is the expulsion of undigested food materials from the alimentary canal. Excretion occurs exclusively in plants through stomata, whereas egestion occurs exclusively in animals through specialized excretory organs.