The narrowest and most numerous tubes of lungs are termed as ____:

Q. The narrowest and most numerous tubes of lungs are termed as ____:
Answer: Bronchioles
Notes: The respiratory bronchioles are the narrowest airways of the lungs, one fiftieth of an inch across. The bronchi divide many times before evolving into the bronchioles. The bronchioles deliver air to the exchange surfaces of the lungs.

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