Esophagus (labels) - histology illustration

This is a histology illustration of the esophagus.

1. Mucosa
2. Submucosa
3. Muscularis
4. Adventitia

From http://www.training.seer.cancer.gov; funded by the U.S. National Cancer Institute's Surveillance, Epidemiology and End Results (SEER) Program, via contract number N01-CN-67006, with Emory University, Atlanta SEER Cancer Registry, Atlanta, Georgia, U.S.A.