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It’s further classified into acute if it lasts less than three weeks, and chronic if it lasts more than three weeks.
When they are closed, air pressure builds up below them, causing them to vibrate and produce sound when we speak.
Like the rest of the respiratory tract, the walls of the larynx are made up of mucosal epithelium.
The mucosal epithelium contains goblet cells, which produce mucus to trap small foreign particles as well as columnar cells, which have cilia, which are tiny little hair like projections that moves mucus up the respiratory tract so it can be coughed out.
Bacterial infections are another cause of acute laryngitis, and sometimes they can develop during or right after a viral infection - that’s called a superinfection.
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