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OpenLearn Create will be unavailable on Tuesday 23 June 2026 from 8am to 11am (GMT) due to routine maintenance.
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Communicable Diseases
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Figure 35.2 Anatomy of the upper and lower respiratory tract. (Source: The Open University, 2008, Chronic Obstructive Pulmonary Disease (SDK125 Case Study 5), Figure 3.3, p.36)
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