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Alex777 [14]
3 years ago
5

Which structure allows upper respiratory infections to spread from the throat to the tympanic cavity?

Biology
1 answer:
Nesterboy [21]3 years ago
3 0

The Eustachian tube is the structure that allows upper respiratory infections to spread. The eustachian tube is a canal that links the middle ear to the nasopharynx, which is composed of the upper throat and the back of the nasal cavity. It also controls the pressure inside the middle ear, making it equal with the air pressure outside the body.

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