What are the main organs of excretion in the body?
Read this standardized test practice passage and answer the questions. You have five and a half minutes to complete the assignment. (17 min) Excretion – the process of removing metabilic wastes from the body. The main waste products eliminated by the body are carbon dioxide, CO2 from cellular respiration, and nitrogenous compounds from the metabolic breakdown of proteins. The most common mammalian metabolic waste is urea, CH4N2O. • Nitrogenous wastes are brought to the liver as ammonia, NH3 a chemical so toxic that it could not remain long in the body without harming cells. • The liver removes ammonia from the blood and converts it into the less harmful urea. Organs of excretion: • Kidneys: the primary organs excretion, the kidneys play a vital role in maintaining the homeostasis of body fluids. They control the amount of ammonia, salt, and water in the blood. • Lungs: the primary site of CO2 excretion, the lungs also carry out detoxification, altering harmful substances so they are no
