AP BIOLOGY

Detailed explanation-1: -In respiration, food is broken down into carbon dioxide and water in the presence of oxygen by releasing oxygen. Some amount of released energy is often converted into heat. The waste materials produced in lungs are carbon dioxide, heat and water.

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: -The lungs are responsible for the excretion of gaseous wastes, primarily carbon dioxide from cellular respiration in cells throughout the body.

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: -The lungs and respiratory system allow oxygen in the air to be taken into the body, while also letting the body get rid of carbon dioxide in the air breathed out.