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Section of the human esophagus. Moderately magnified. The section is transverse and from near the middle of the gullet.
a. Fibrous covering.
b. Divided fibers of longitudinal muscular coat.
c. Transverse muscular fibers.
d. Submucous or areolar layer.
e. Muscularis mucosae.
f. Mucous membrane, with vessels and part of a lymphoid nodule.
g. Stratified epithelial lining.
h. Mucous gland.
i. Gland duct.
m’. Striated muscular fibers cut across.
There are two types:
- Esophageal glands proper- located in the submucosa and secrete acid mucin for lubrication
- Esophageal cardiac glands- in the lamina propria and secrete neutral mucus that protects the oesophagus from acidic gastric juices.
Each opens upon the surface by a long excretory duct.
- Histology image: 49_07 at the University of Oklahoma Health Sciences Center
- Histology image: 10802loa — Histology Learning System at Boston University
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