In this low-power view of the wall of the upper esophagus, the lumen (L)
is on the left. Note the mucosa, with its stratified squamous epithelium
(SSE). External to this (still part of the mucosa) is the lamina propria
(LP). The final layer of the mucosa is the muscularis mucosae (MM).
Towards the right is the submucosa (SM), with prominent blood vessels
(BV) seen in cross section.
The muscularis extends off the field toward the right. The adventitia, or
outermost layer, is not visible in this picture.
(Press BACK button on browser to return)