A picture review of basic esophageal histology...
There are four main layers of the esophagus
(from innermost luminal surface (part that food touches as it goes down) to the external surface)
1. Mucosa Innermost layer of the esophagus. Composed of luminal surface epithelium with underlying lamina propria and muscularis mucosae
2. Submucosa Contains connective tissue & lymphovascular channels
3. Muscularis propria Oriented as an inner circular and outer longitudinal muscl