Mucous membrane of the stomach.
Light micrograph (LM) of the stomach wall showing four concentric layers at low magnification. A thick mucosa (formed mostly of tightly packed gastric glands) lines the lumen (*). The rectangle indicates a ruga consisting of a submucosal connective tissue core covered by mucosa. A thick layer of mucus secreted by surface cells forms a barrier over the mucosa for protection of tissues from acid and proteolytic enzymes in the lumen. The submucosa (SM) has prominent blood vessels (BV). Serosa covers the muscularis externa (ME) externally. 10×. H&E.
Light micrograph (LM) of the stomach wall showing four concentric layers at low magnification. A thick mucosa (formed mostly of tightly packed gastric glands) lines the lumen (*). The rectangle indicates a ruga consisting of a submucosal connective tissue core covered by mucosa. A thick layer of mucus secreted by surface cells forms a barrier over the mucosa for protection of tissues from acid and proteolytic enzymes in the lumen. The submucosa (SM) has prominent blood vessels (BV). Serosa covers the muscularis externa (ME) externally. 10×. H&E.
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