Question

Which of the following statements is correct about normal human lung anatomy?

A) The right lung has three lobes; the left lung has two lobes
B) The right lung has two lobes; the left lung has three lobes
C) Both lungs have two lobes
D) Both lungs have three lobes

Answer 1

The right lung has three lobes, and the left lung has two lobes to accommodate the space occupied by the heart.

Step-by-step explanation:

The correct statement about normal human lung anatomy is A) The right lung has three lobes; the left lung has two lobes. This variation allows space for the heart on the left side of the chest cavity. The right lung consists of three lobes called the superior, middle, and inferior lobes, while the left lung has two lobes known as the superior and inferior lobes. The left lung is smaller because of the heart's presence, which creates a cardiac notch that accommodates the heart. Each lobe is further divided into bronchopulmonary segments, with each segment receiving air from its own tertiary bronchus and blood from its own artery. Understanding the structure of the lungs is crucial for comprehending their function in the respiratory system as they facilitate the exchange of oxygen and carbon dioxide with the atmosphere.