Name the airway from nostril to alveolus, reproduce the lung-volume table, explain how oxygen and carbon dioxide travel and why a smoker's lungs stop emptying.
Respiration averages one or two of the fifteen Human Biology questions. MEC's scope has four lines — "Respiratory organs; Gas exchange and transport; Regulation of respiration; Concept of respiratory disorders" — the fourth new in 2026, so expect a named disorder with its mechanism. The usual angles:
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