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Histology Art (MT30 – G) 4 years, 2 months ago Took quite some time before I was able to shimmy down another histology art of the digestive system cause my mind can’t seem to pass the idea that screen break is over so my motivation is a bit constipated at the moment. I did manage to push through, albeit rather slowly, and TA-dump
Mucosa: It is composed of the epithelium, lamina propia, and muscularis mucosae. It is also where you can find the gastric glands, tubular glands that extend from the pits of the muscularis mucosae.
Submucosa: composed of dense irregular connective tissue
Muscularis external: composed of an inner oblique layerm a middle circular layer, and an outer longitudinal layer.
Adventitia: loose irregular connective tissue
The stomach and the duodenum are composed of four layers that is a distinguishing feature of organs in the gastrointestinal tract. These layers are the mucosa, submucosa, muscularis external, and adventitia.
In the mucosa of the stomach you’ll find long pits and short coiled glands that abruptly changes as it reaches the duodenum.
The lamina propia in the pyloric stomach can be found between the gastric pits and glands, whereas in the duodenum it forms the core of the intestinal villi.
Mucosa: In the mucosa you’ll find villi, tall, slender finger-like projections that houses the absorptive cells or enterocytes. These cells are simple columnar. Goblet cells are also found in the villi, these cells secrete mucus for lubrication. At the base of the villi are crypts composed of intestinal glands.
The lamina propria and the muscularis mucosae can also be found in the mucosa. On the lamina propria are Peyer’s patches, loose infiltrations of lymphatic tissue present in the intestinal wall.
Submucosa: Composed of connective tissue with permanent folds that circle the inner surface of the intestinal lumen.
Muscular external: two orthagona; layers of smooth muscle
Adventitia: loose irregular connective tissue