alleryStart learning →A respiratory bronchiole is described as the smallest type of:
AAlveolus
BPleura sac
CLung lobe
DBronchiole
Answer & Solution
Correct answer: D. Bronchiole
1. The airway narrows in named steps.
2. The respiratory zone begins at the respiratory bronchiole.
3. A respiratory bronchiole is the smallest type of bronchiole.
4. It then leads to an alveolar duct.
_Source: OpenStax Anatomy and Physiology 2e (CC BY 4.0), Ch 22 'The Respiratory System', sections 22.1-22.6_
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