Excretion example sentences

Aldosterone acts mainly at the renal tubules and stimulates the reabsorption of Na+ and water and excretion of K+ and phosphate ions.Nature of nitrogenous wastes formed and their excretion vary among animals, mainly depending on the habitat (availability of water).So, where do animals get their food from? But, first of all why do we have to eat food? You already know that the energy from food is utilised by organisms for carrying out their various body functions, such as digestion, respiration and excretion.