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Air passing from the pharynx to an alveolus travels through the larynx, trachea, bronchi and then:
APleurae then alveoli
BDiaphragm then alveoli
CMediastinum then alveoli
DBronchioles then alveoli
Answer & Solution
Correct answer: D. Bronchioles then alveoli
1. The airway narrows in a fixed anatomical order.
2. The larynx connects the pharynx to the trachea.
3. The lungs are connected to the trachea by the right and left bronchi.
4. The bronchi branch down to terminal and then respiratory bronchioles.
5. A respiratory bronchiole leads to an alveolar duct opening into a cluster of alveoli.
_Source: OpenStax Anatomy and Physiology 2e (CC BY 4.0), Ch 22 'The Respiratory System', sections 22.1-22.6_
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