The biological process involved in removing harmful metabolic wastes from the body is known as excretion. Excretion is the elimination of waste products resulting from cellular activities, maintaining the internal environment’s homeostasis. In humans, key excretory organs include the kidneys, which filter blood to remove metabolic by-products like urea and excess salts. These waste products are then transported to the bladder and expelled as urine. Other excretory pathways include the respiratory system, eliminating carbon dioxide, and the skin, excreting small amounts of salts and urea through sweat. Together, these mechanisms ensure the removal of waste to support overall physiological balance.