The trachea and bronchi are lined with cilia which waft mucus up to the back of the throat to be swallowed.
La tráquea y los bronquios están revestidos de cilios que arrastran el moco hacia la parte posterior de la garganta para ser tragado.
| Text | The trachea and bronchi are lined with cilia which waft up mucus to the back of the throat to be swallowed |
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Tags: b3, bio, viruses
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