AP BIOLOGY

Detailed explanation-1: -Lungs. Our lungs are mainly concerned with respiration, but they help in the removal of a large amount of carbon dioxide and water from our body through the air that we expire. Carbon dioxide is a waste product formed due to the oxidation of food. It is carried to the lungs by the blood.

Detailed explanation-2: -The lungs in the respiratory system excrete some waste products, such as carbon dioxide and water. The skin is another excretory organ that rids the body of wastes through the sweat glands.

Detailed explanation-3: -Once in the lungs, oxygen is moved into the bloodstream and carried through your body. At each cell in your body, oxygen is exchanged for a waste gas called carbon dioxide. Your bloodstream then carries this waste gas back to the lungs where it is removed from the bloodstream and then exhaled.

Detailed explanation-4: -CO2 is transported in the bloodstream to the lungs where it is ultimately removed from the body through exhalation. CO2 plays various roles in the human body including regulation of blood pH, respiratory drive, and affinity of hemoglobin for oxygen (O2).

Detailed explanation-5: -Various substances like carbon dioxide, urea, ammonia, salts, etc., are produced by our body. These substances are not required and it has to be removed. Lungs help in the removal of carbon dioxide by exhalation. Nitrogenous wastes and salts are removed by the excretory system.