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Diagram showing parts of the stomach. The human stomach can be divided into four sections, beginning at the cardia followed by the fundus, the body and the pylorus. [7] [8] The gastric cardia is where the contents of the esophagus empty from the gastroesophageal sphincter into the cardiac orifice, the opening into the gastric cardia.
The pylorus of the stomach has a thickened portion of the inner circular layer: the pyloric sphincter. Alone among the GI tract, the stomach has a third layer of muscular layer. This is the inner oblique layer and helps churn the chyme in the stomach.
Histology image: 11304loa – Histology Learning System at Boston University - "Digestive System: Alimentary Canal: fundic stomach, gastric glands, base" "chief cell" at Dorland's Medical Dictionary; Nosek, Thomas M. "Section 6/6ch4/s6ch4_8". Essentials of Human Physiology. Archived from the original on 2016-03-24.
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.
Chief cells are part of fundic gland polyps (here shown in high magnification). [11]In gastric tissue, a loss of parietal cells due to chronic inflammation has been shown to affect chief cell differentiation and can induce chief cells to transdifferentiate back into neck cells and can lead to the formation of mucus cell metaplasia known as spasmolytic polypeptide expressing metaplasia (SPEM ...
This allows the stomach to expand, therefore increasing the volume of the stomach without increasing pressure. [2] They also provide the stomach with an increased surface area for nutrient absorption during digestion. [2] Gastric folds may be seen during esophagogastroduodenoscopy or in radiological studies. [3] [4]
Histology image: 11303loa – Histology Learning System at Boston University - Digestive System: Alimentary Canal: fundic stomach, gastric glands, lumen" Nosek, Thomas M. "Section 6/6ch4/s6ch4_8". Essentials of Human Physiology. Archived from the original on 2016-03-24. Nosek, Thomas M. "Section 6/6ch4/s6ch4_14". Essentials of Human Physiology.
Foveolar cells in the antrum of stomach. A skewed cross-section of the columns gives a false impression of being stratified epithelium. Foveolar cells line the surface of the stomach and the gastric pits. They constitute a simple columnar epithelium, as they form a single layer of cells and are taller than their width. Other mucus-secreting ...