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The function of tracheal hair to...

The function of tracheal hair to

A

Pass mucus out

B

Pass mucus in

C

Pass air out

D

Pass air in

Text Solution

Verified by Experts

The correct Answer is:
A
The mucus in the trachea and bronchi is sticky so that it traps any dust and micro-organisms which you breathe in. The cells lining the air tubes are covered with tiny hairs called cilia. The cilia move back and forth to sweep the mucus upward towards the throat.
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