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English: Diagram of alkaline Mucous layer in stomach with mucosal defense mechanisms Polski: Schemat budowy błony śluzowej żołądka z uwzględnieniem mechanizmów bariery śluzowo-alkalicznej 日本語: 粘膜防御機構を備えた胃の塩基性粘液層の図
The appendix has a mucosa resembling the colon but is heavily infiltrated with lymphocytes. Transition between the different types of epithelium occurs at the junction between the oesophagus and stomach; between the stomach and duodenum, between the ileum and caecum, and at the pectinate line of the anus. [1]
English: Diagram showing the Stomach mucosal layer protecting the epithelial cell layer from the gastric juices. Bicarbonate is pumped from the capillaries by the epithelial layer and into the mucosal layer to neutralise the high acidity there.
It is the innermost layer of the stomach. [5] It is affected by the hormone histamine, which signals it to release hydrochloric acid (HCl). Sub-mucosal layer – This layer consists of different vessels and nerves, ganglion neurons, and adipose tissue. It is the second layer of the stomach and supports the mucosa. [6]
Diagram of the alkaline mucous layer in the stomach with mucosal defense mechanisms. The gastric mucosa is the mucous membrane layer of the stomach, which contains the gastric pits, to which the gastric glands empty. In humans, it is about one mm thick, and its surface is smooth, soft, and velvety.
The gastric mucosal barrier is the property of the stomach that allows it to safely contain the gastric acid required for digestion. If the barrier is broken, as by acetylsalicylic acid (ASA, aspirin) in acid solution, acid diffuses back into the mucosa where it can cause damage to the stomach itself.
Description: Diagram of basic surface anatomy and regions of the stomach. Drawn in Inkscape. Based on diagram from Moore, K.L., & Agur, A.M. (2007).
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