Normal esophageal and tracheal mucosa

Normal esophageal and tracheal mucosa •Nonkeratinizing sqamous epithelium of esophagus (black arrow) •Ciliated columnar tracheal epithelium (green arrow) •Cartilaginous tracheal ring (yellow arrow) (Description By:Martin Nadel, M.D. ) (Image Contrib. by: UCHC )