The function of the bronchus is to conduct air into the lungs so that you can breathe.
Without your bronchus you cannot breathe.
Your bronchus is a passage of airway in the respiratory tract that conducts air into the lungs to allow you to breathe and the bronchus branches into smaller tubes called bronchioles.
When you breathe into your nose or mouth, the air travels into your larynx.
Your bronchus or bronchi is located in the thoracic cavity along with the trachea and your lungs.
The bronchus also originates from the lower end of the trachea or windpipe, where it then divides or bifurcates (at the point of carina) into the left and right bronchus.
The bronchus is very important to you being able to breathe.