alleryStart learning →What passes into the lung at the hilum along with the primary bronchus?
AOnly the pulmonary veins and lymphatics
BOnly the bronchial cartilage and mucosa
CAlveolar ducts and terminal bronchioles
DBlood vessels, lymphatic vessels and nerves
Answer & Solution
Correct answer: D. Blood vessels, lymphatic vessels and nerves
1. The hilum is a concave region on the mediastinal surface of the lung.
2. The primary bronchi enter there, and so do blood vessels, lymphatic vessels and nerves.
3. So the fourth option lists the full set correctly.
4. Alveolar ducts and terminal bronchioles lie deep inside the lung tissue rather than at the hilum, which rules out the third option.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 22 "The Respiratory System", section 22.1 Organs and Structures of the Respiratory System_
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