What are Bronchi. Bronchi, branching from the trachea, are the primary passageway for air to get into the lungs . It is the plural for bronchus. Each bronchus further branches into smaller tubes or bronchioles. There are two primary (extrapulmonary) bronchi – the right and left main bronchi that connect the trachea to the two lungs .
The image on this page depicts the trachea, bronchi, and the several lobes of the left and right lungs. The trachea (windpipe) is the passageway that allows air to travel to and from the lungs. The structure of the trachea is supported by rings of cartilage that keep it from collapsing.
The bronchi are lined with the same type of mucus that lines the rest of the respiratory tract. Foreign objects breathed into the lungs often end up in the right bronchus, as it is larger than the left. Once inside the lungs, each bronchus is further divided into five smaller, secondary bronchi, which provide air to the lobes of the lungs.