The oral cavity and its components – are covered in Chapter 13 – Oral Histology.
The image is a small magnification of a section of an esophagus, which allows us to observe the main histological features of this organ:
Components of the mucous layer
1 – Lining by non-cornified stratified squamous epithelium (in red).
2 – Loose or dense unshaped connective tissue that supports the lining epithelium, called lamina propria (in light blue).
3 – Layer of smooth muscle called muscularis mucosa (in light green).
Submucosa (highlighted in blue, formed by dense, irregular connective tissue.
One of the striking features of the esophagus is the presence of mucous-type glands in the submucosal layer. In the rest of the digestive tract, only the duodenum has glands in the submucosal layer.
Part of the muscler layer of the wall can be seen, highlighted in dark green). Depending on the region of the esophagus, this muscle is formed by striated skeletal muscle (seen in the image) or smooth muscle.
