normal esophageal and tracheal mucosa

normal esophageal and tracheal mucosa •Nonkeratinizing esophageal sqamous epithelium(black arrow) •Columnar respiratory epthium of trachea(green arrow) •Developing cartilaginous tracheal ring(white arrow) •Interface between esophagus and trachea(double arrow) (Description By:Martin Nadel, M.D. ) (Image Contrib. by: )