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The upper part of the respiratory tract ...

The upper part of the respiratory tract is provided with small hair-like structures called `"______"`.

A

Bronchi

B

Cilia

C

Villi

D

Alveoli

Text Solution

Verified by Experts

The correct Answer is:
B
The respiratory system is lined with a mucous membrane that secretes mucus. The mucus traps smaller particles like pollen or smoke. Hairlike structures called cilia line the mucous membrane and move the particles trapped in the mucus out of the nose.
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