Light microscopy of the trachea. The inner lining consists of a so-called respiratory epithelium although no gas exchange or respiration occurs in the trachea. Blue-stained cells in the pseudostratified columnar surface epithelium are goblet cells secreting mucus. The irregular nature of the epithelium surface is due to minute cilia. Occasional mucoid-type glands are deep and part of the tracheal rings of cartilage are noted. Magnification x80 when narrow width printed at 10 cm.
Model release not required. Property release not required.