Question

The alveoli are

thin membranes covering the lungs


the structure that contains the vocal chords


smaller branches in the lungs


sacs at the end of bronchioles


tubes branching from the trachea

Answer 1

Tiny air sacs at the end of the bronchioles (tiny branches of air tubes in the lungs). The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out.

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Answer 2

Answer:

sacs at the end of bronchioles