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OpenLearn Create will be unavailable on Wednesday 18 March 2026 from 8am to 10am due to routine maintenance.
OpenLearn Create will be unavailable on Wednesday 18 March 2026 from 8am to 10am 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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