The respiratory system Paper instructions: Explore the respiratory pathway using the interactive human body diagram. Trace the pathway a molecule of oxygen takes after it is inhaled through the nose. Through which structures does it pass as it makes its way to the pulmonary capillaries? Be detailed in your description of the way oxygen moves through body systems. Then describe how breathing is affected in a patient with emphysema, using what you understand about the respiratory system structures and pathways. Use at least two sources for this assignment.