ANATOMY

Detailed explanation-1: -The right lung consists of three lobes: the right upper lobe (RUL), the right middle lobe (RML), and the right lower lobe (RLL). The left lung consists of two lobes: the left upper lobe (LUL) and the left lower lobe (LLL).

Detailed explanation-2: -The left lung has only two formal lobes because of the space taken up in the left side of the chest cavity by the heart, though it does have the lingula, which is similar to a lobe.

Detailed explanation-3: -The right lung has two fissures, oblique fissure and horizontal fissure, which separate the lung into three lobes-upper, middle, and lower. Each lobe has its own visceral pleural covering.

Detailed explanation-4: -Each lung is separated into lobes branching off the main bronchus; the right lung has three lobes, while the left has only two lobes. As the bronchi branch out, the total area of the two new branches is larger than its parent bronchus, making it extremely easy for the air to rush into the lungs.