The trachea is part of the lower respiratory tract, along with the lungs, bronchi, bronchioles, and alveoli. The strong, flexible tube is also called the windpipe because its main job is to move ...

I was recently sick with what I thought was the flu. I had a fever, sore throat and a terrible cough. I have asthma, so my husband insisted that I see our family doctor.

The trachea divides into two bronchi, with one bronchus for each lung. Each bronchus divides further in the lungs into smaller tubes called bronchioles. At the end of each bronchiole, there is a ...

Cilia are small hairs which beat to push the mucus back up the trachea so it can be swallowed and destroyed in the stomach. Clean air then enters the two bronchi, one bronchus going to each lung.