1- Introduction

• The right main bronchus is wider, shorter, and more vertical, making it the most common site for foreign body aspiration.
• The right lung has 3 lobes and 2 fissures (oblique and transverse/horizontal).
• The left lung has 2 lobes and 1 fissure (oblique).
• The lungs have a dual blood supply: pulmonary (for gas exchange) and bronchial (for tissue nourishment).
• The pulmonary artery carries deoxygenated blood; pulmonary veins carry oxygenated blood.
• The parietal pleura is innervated by somatic nerves and feels pain; the visceral pleura does not.
• The right lymphatic duct drains the entire right lung and the left lower lobe, whereas the thoracic duct drains the left upper lobe.

Give Reason]

Aspirated foreign bodies (e.g., a swallowed toy part by a child) are clinically much more likely to be lodged in the right lung rather than the left lung.",

"answer": "

This is due to the anatomical differences between the two main bronchi. The right main bronchus is shorter , wider and runs in a more direct continuation (more vertically oriented) with the trachea. Therefore, it serves as the path of least resistance for aspirated materials.