[Aerodynamic characteristics of the human right lung bronchial tree]
Abstract:
A new method of studying the aerodynamical characteristics of normal right bronchial tree in 17 natural preparations is described. The authors have found that 24 to 44 per cent of the total airflow entering the right main bronchus pass through the upper lobe bronchus, 9-26 per cent through the middle lobe bronchus and 38-56 per cent through the lower lobe bronchus. The data obtained show good agreement with the volume of the corresponding lobe expressed as percentage to the total right lung volume. Bronchial tree preparations differ greatly in their carrying capacities due to their corresponding aerodynamical resistances (+50% +25%). The relationship between resistance coefficient of the bronchial tree preparations and their geometrical parameters has been found.
Related Concept Videos
The Respiratory System
The Bronchial Tree
The trachea, commonly known as the windpipe, is a tube that connects the larynx (voice box) to the bronchi. At a point called the carina, it bifurcates into two primary bronchi. The right primary bronchus is wider, shorter, and more vertical than the left primary...
Gross Anatomy of the Lungs
Pressure Relationships in Thoracic Cavity
Breathing Mechanisms
Both intra-alveolar and intrapleural pressures rely on specific lung properties. The ability to breathe—allowing air to enter the lungs during...
Factors Affecting Pulmonary Ventilation
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
Anatomy of Respiratory System II: Lower Respiratory Tract
The Larynx
It is located between the pharynx and the trachea, acts as a passageway for air, and hosts several critical structures, such as the epiglottis, vocal cords, and glottis. The epiglottis acts as a gateway, guiding food to the...


