Stomach location, structure

Stomach location and structure - a schematic drawing of the upper part of the digestive tract is shown in Figure 1.

with Food-pipe, which is usually 25-30 cm long, joins the stomach at the mouth of the stomach, the stomach circular sphincter muscle that releases food into the stomach.

Figure 1 Structure of the upper part of the digestive tract:
oesophago-gastric duodenum (schematic drawing)

with Stomach is located in the abdominal cavity, below the left diaphragm. From above, the diaphragm and the Liver, from right to Liver, from the bottom of the ridge Large intestine and the mesocolon (the peritoneal septum that attaches the transverse colon to the posterior wall of the abdominal cavity), the spleen on the left, the Pancreas, bordered in the front by the chest and abdominal wall.

with Stomach with Food-pipe a hollow organ located between the stomach and the horseshoe casing, which can be divided into several parts: the stomach lining (cardia), the fundus (the dome-shaped part of the stomach to the left of the cardia), the body (corpus), the horizontal section (antrum) following it, and the stomach cap (pylorus).

It is made up of the following layers from the inside out: mucosa (tunica mucosa): covered by a single layer of cylindrical epithelium, with a corion (lamina propria mucosae) underneath, in which the gastric glands are embedded.

At the bottom is a thin layer of smooth muscle (lamina muscularis mucosae). On the mucosa, folds can be observed at the level of the fundus and corpus, which allow the Stomach expansion. The folds are located longitudinally from the cardia to the angulus.

It is followed by the submucosa: a thick layer of loose fibrous connective tissue with a rich network of blood and lymphatic vessels. It is also the site of the Meissner's plexus, which plays a role in autonomic innervation.

Next comes a complex layer of muscle (tunica muscularis), made up of three layers of well-developed smooth muscle (inner: oblique, middle: circular, outer: longitudinal). Between the outer and middle layers is the Auerbach's plexus.

Finally, it is covered on the outside by the serosa (tunica serosa), the visceral peritoneum.