gas exchange between the air in the lungs and their blood supply occurs here

A) pharynx
B) larynx
C) trachea
D) bronchiole
E) alveolus

Gas Exchange

The biological process through which organisms exchange gases with their environment, such as oxygen for respiration and carbon dioxide as a waste product.

Blood Supply

The delivery system by which blood, carrying oxygen and nutrients, is transported throughout the body to tissues and organs via the circulatory system.