Is the lining of trachea simple squamous?

No, the lining of the trachea is not simple squamous epithelium; it is primarily composed of pseudostratified ciliated columnar epithelium. This type of epithelium features cilia that help trap and move debris and mucus out of the respiratory tract. The presence of goblet cells, which produce mucus, is also a characteristic of this lining, aiding in the protection and moistening of the airway.