Bulk flow and diffusion in the airways of the lung.
D006801:Humans; D008168:Lung / Q000502:physiology*; D011656:Pulmonary Emphysema / Q000503:physiopathology; D012119:Respiration / Q000502:physiology*; D012143:Respiratory Physiological Phenomena; D012137:Respiratory System / Q000033:anatomy & histology