Trachea
Definition: The trachea is more commonly known as the windpipe. The trachea extends between the larynx and the bronchi. The trachea is a rigid structure formed of rings of cartilage to help keep the airways open. The trachea is lined with mucus membranes which add moisture to the air as it passes through the trachea. The trachea is lined with cilia that sweep mucus and small particles back up the airway.
