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Sputum
? TBD
Mucus that is coughed up from the lower airways
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Wikipedia

Sputum is mucus that is coughed up from the lower airways (the trachea and bronchi). In medicine, sputum samples are usually used for a naked-eye examination, microbiological investigation of respiratory infections, and cytological investigations of respiratory system.

Instance of
Signs and symptoms
Subclass of
respiratory signs and symptoms
References
Wikidata