The mucous was drained from the sinuses before it was expelled by the sneeze. The sinuses are cavities of the head.
What are sinuses?
The sinuses can be defined as four (4) cavities located in the head, which are interconnected by channels.
The sinuses act to produce mucus, which is capable of draining the channels found in the nose.
This mucous can protect from pathogenic microorganisms during early infection (e.g. bacteria).
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