In adults the right main bronchus is more vertical than the left.

The bronchopulmonary segments are only based on the pulmonary arterial system.

The bronchioles contain cartilage.

Gas exchange takes place in the terminal bronchioles and acini.

diffusion of CO₂ and O₂ across membranes in the tissues.

diffusion of HCO3^- out of the red blood cells.

binding of O₂ to hemoglobin.

movement of air from the atmosphere to the lungs.

gas exchange between the venous blood and the lungs.

150 mmHg

575 mmHg

138 mmHg

Vocal fold

Hayoid bone

Epiglottis

Cricoid cartilage

Thyroid cartilage

Vocal fold

Hayoid bone

Epiglottis

Cricoid cartilage

Thyroid cartilage