Muscularis Mucosa

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Microscopic analysis of the stomach’s structure reveals that it is made of several distinct layers of tissue: the mucosa, submucosa, muscularis, and serosa layers.
The most inner layer of the stomach is known as the mucosa. It is made from mucous membrane. The mucous membrane in the stomach contains columnar epithelium tissue containing many exocrine cells. Small pores know as gastric pits contain lots of these cells that secrete both the digestive enzymes and hydrochloric acid into the hollow region (lumen) of the stomach. Certain cells (Mucous) found throughout the stomach lining and gastric pits secrete mucus. This is to protect the stomach from its own digestive secretions. The mucosa of the stomach is thicker than the mucosa of the other organs due to the depth of the gastric pits. …show more content…
The muscularis mucosae’s layer allows the mucosa to form folds and increase its contact with the stomach’s contents.
The submucosa is made up of various connective tissues, blood vessels, and nerves. The submucosa layer is surrounding the mucosa in the stomach. Connective tissues support the tissues of the mucosa and connect it to the muscularis layer. The blood supply of the submucosa provides a variety of nutrients to the wall of the stomach. Nervous tissue in the submucosa monitors the contents of the stomach and controls smooth muscle contraction and secretion of digestive substances.
The outermost layer of the stomach surrounding the muscularis layer is the serosa – a thin serous membrane made of simple squamous epithelial tissue and areolar connective tissue. The serosa has a smooth, slippery surface and secretes a thin, watery secretion known as serous fluid. The smooth, wet surface of the serosa helps to protect the stomach from friction as it expands with food and moves to mix and propel the

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