EXCRETION AND HOMEOSTASIS (PLANT AND ANIMAL)

EXCRETION AND HOMEOSTASIS (PLANT AND ANIMAL) Introduction What is Excretion? Excretion is the process by which living organisms separate and eliminate waste products of metabolism from body cells. If these substances were left to accumulate, they would be toxic to the cells. Egestion is the removal of undigested materials from the alimentary canals of animals. Secretion is the production and release of certain useful substances such as hormones, sebum and mucus produced by glandular cells. Homeostasis is a self-adjusting mechanism to maintain a steady state in the internal environment   Excretion in Plants Plants have little accumulation of toxic waste especially nitrogenous wastes. This is because they synthesise proteins according to their requirements. In carbohydrate metabolism plants use carbon (IV) oxide released from respiration in photosynthesis while oxygen released from photosynthesis is used in respiration. Gases are removed from the plant by diffusion through stomata and lenticels. Certain organic products… Read More »EXCRETION AND HOMEOSTASIS (PLANT AND ANIMAL)