Respiratory Cells in Research - A New Blog From Lifeline

Breathing is Something We Take Very much for Granted

Oxygenated air enters through the mouth or nose and passes into the trachea. The trachea branches into two bronchi, which lead to each lung. The bronchi divide into progressively smaller branches, called bronchioles. At the end of bronchioles are alveoli, sacs that mediate the exchange of oxygen and carbon dioxide.

A layer of epithelial cells lines the respiratory tract. This epithelium provides a barrier against the external environment and protects against infection from airborne pathogens. Defective barrier function or viral infection can lead to respiratory tract disease.

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