nose, where air is filtered, moistened, and warmed.
pharynx, or throat, which serves as a passageway for both air and food
trachea, or windpipe, and the larynx, or vocal cords.
bronchi, two large tubes that lead to the lungs. Each bronchus branches into smaller passageways called bronchioles that end in tiny air sacs called alveoli within the lungs.
Gos Exchange and transport oxygen and carbon dioxide are exchanged across the walls of alveoli and capillaries, Chemical properties of blood and red blood cells allow for efficient transport of gases throughout the body