AP BIOLOGY

Detailed explanation-1: -excretion, the process by which animals rid themselves of waste products and of the nitrogenous by-products of metabolism. Through excretion organisms control osmotic pressure-the balance between inorganic ions and water-and maintain acid-base balance.

Detailed explanation-2: -Excretion involves the separation and elimination of metabolic waste products from the body. Various organs are involved in this process: the lungs, gills, skin, etc. The kidneys and their ducts are the major full-time excretory organs and comprise the excretory system.

Detailed explanation-3: -The excretory system is in charge of removing all metabolic wastes from the body. The human excretory system consists of organs that aid in the elimination of nitrogenous wastes from the body. A pair of kidneys, a pair of ureters, a bladder of urine, and the urethra are organs of the human excretory system.

Detailed explanation-4: -The process of removing all toxic or harmful substances from the body of an organism is termed excretion.

Detailed explanation-5: -Metabolic wastes or excrements are substances left over from metabolic processes (such as cellular respiration) which cannot be used by the organism (they are surplus or toxic), and must therefore be excreted. This includes nitrogen compounds, water, CO2, phosphates, sulphates, etc.