J40-J47: Chronic lower respiratory diseases

J40: Bronchitis, not specified as acute or chronic

The air is breathed in through the mouth or nose. From there the air goes into the trachea via the larynx. At the end of the windpipe are two bronchial tubes (or bronchi) branching away from it. The bronchial tubes run into the lungs. What is more, the bronchial tubes divide into even smaller branches. The larynx, the trachea, the bronchia and the lungs are part of the lower airways.

Your bronchial tubes are inflamed. You may thus have a cough and headache.