Air enters through mouth or nose and moves to pharynx and larynx
Trachea is a strong tube with cartilage rings that prevents collapsing
Trachea divides into left and right bronchus, then into smaller bronchioles
Bronchioles end in tiny air sacs called alveoli
Gas exchange happens between alveoli and capillaries
Oxygen moves from lungs to bloodstream and carbon dioxide moves from blood to lungs
Oxygen attaches to red blood cells and carbon dioxide is blown out during exhale
Walls of alveoli share a membrane with capillaries for easy diffusion
Gas exchange is necessary for survival to replenish oxygen and eliminate carbon dioxide
Alveoli inflate during inhale and deflate during exhale.

Test your knowledge of the respiratory system with this quiz! From the entry of air through the nose and mouth to gas exchange in the alveoli, this quiz covers the essential functions of the lungs. Explore the anatomy of the respiratory tract, understand the process of oxygenation and elimination of carbon dioxide, and learn how alveoli and capillaries work together for easy diffusion. Sharpen your skills and see how well you understand the mechanics of breathing.