From this App you can learn : Delineate the structures of respiratory system and their functions. Describe the basic structure and function of human lungs. Define "respiratory cycle" and distinguish between inspiration and expiration. Understand and explore the mechanism of breathing control in lungs. Explore how gases are exchanged during breathing. Systematize the path of a molecule of oxygen as it passes from the human nose to an alveolus. List some of the diseases/conditions that badly inf