The stomach is divided into several parts The parts of the stomach have their own names

The stomach is divided into three parts, namely the upper navel, the middle navel, and the lower navel.

It is divided into three parts: upper, middle and lower. The upper part of the stomach is called the upper navel, including the cardia; The middle part of the stomach is called the middle navel, that is, the part of the body of the stomach; The lower part of the stomach is called the lower navel, including the pylorus. The main physiological function of the stomach is to accept and decay the water valley, and the stomach is reduced to harmony, and the spleen is on the surface.

The shape of the stomach is related to the shape of the animal: fish, tailed amphibians and snakes, because of their slender body, the stomach is spindle-shaped; Mammals have a short and thick body, and their stomachs are bent in the shape of a pouch and lie horizontally in the abdominal cavity.

In addition, the morphology and structure of the stomach can change depending on the need to store food, the nature of the food, and the frequency of ingestion.

In primates, most carnivores, and many insectivores, the stomach tends to be a single-chambered organ, and the part where the anterior end connects to the esophagus is called the cardia, and the posterior part where it connects to the duodenum is called the pylorus.

The stomach is in the upper part of the abdominal cavity in the human body, mainly the left upper abdomen. The entrance to the upper end of the stomach is connected to the lower end of the esophagus and is called the cardia; The lower exit is located in the duodenum and is called the pylorus. The whole stomach is a large sac-like organ, which is divided into a small gastric curvature, a greater gastric curvature, the anterior wall of the stomach close to the abdominal wall, and the corresponding posterior wall of the stomach.

It is divided into four parts, pylorus, gastric body, fundus, and cardia.

It seems to be three parts.

Cardia, gastric body, pylorus.

Mucosal layer, serous layer, muscle layer.

The part of the stomach near the caria is called the cardia part, the part near the pylorus is called the pylorus part or pyloric sinus, and the middle part of the two is called the gastric body. In ruminants (cattle, goats, and sheep) the stomach is divided into four chambers, called the rumen, reticulum, valve, and pucker stomach (see Ruminant Stomach). The sac is thin-walled, and its inner surface is covered by stratified squamous epithelium, which contains digestive enzymes secreted by the esophagus and salivary glands.

There are generally 3 types of gastric glands: the cardia glands, the pyloric glands, and the oxyntic glands. The first two are found in the cardia and pyloric regions, respectively, and both secrete mucus.

Oxyntic glands are mainly found in the mucosa of the gastric body and fundus, and are straightened duct glands, and the lumen of about 3 7 glands is discharged into a small pit on the surface of the gastric mucosa, with about 90 100 small pit per square millimeter of mucosa.

There are three types of cells in the oxyntic glands, namely master cells, parietal cells and mucus cells, in addition to secreting water and inorganic salts, each cell has its own special secretions: master cells secrete pepsinogen, parietal cells secrete hydrochloric acid and intrinsic factors, and mucus cells secrete mucus.

The stomach is innervated by sympathetic and parasympathetic nerves. The sympathetic nerve comes from the celiac ganglia, the parasympathetic nerve is the vagus nerve, and the stomach is rich in blood vessels and lymphatic vessels.

The stomach can be divided into four parts, the cardia part, the fundus, the corpus gastric body, and the pyloric part. There are two openings, the pylorus and the cardia. There are two curves, the greater curvature and the lesser curvature.

The point of complexity can also be said: the stomach has a four-layer structure typical of the digestive tract, which are the mucosa, the submucosa, the muscular layer and the external (serous) membrane. In the four-layer structure of the gastric wall, the muscle layer is composed of three layers of smooth muscle, followed by the longitudinal layer, the annular layer, and the oblique fibers from the outside to the inside.

The annular layer is the most developed and is particularly enhanced at the pylorus, forming the pyloric sphincter. It has the effect of delaying the emptying of gastric contents and preventing the reflux of intestinal contents into the stomach. The gastric mucosal layer is soft, has an abundant blood supply, and is red or reddish-brown in color.

The gastric mucosa forms many wrinkle pockets of different heights, and the 4 or 5 longitudinal wrinkles in the small bend of the stomach are more constant. The gastric mucosa forms a circumferential puff in the pylorus, which protrudes into the cavity and is called the pyloric valve. The surface of the gastric mucosa is covered with irregularly distributed small grooves, which are connected to each other in a network.

The gastric mucosa in the mesh is a hilly-like bulge, with a diameter of 1 6mm, called the gastric area, and when observed with a magnifying glass, there are many small depressions on the surface of the gastric area, called the gastric fovea, which is the opening of the gastric gland.

The structure of the stomach.

The stomach is the widest part of the human digestive tract and is located in the upper left abdomen, like an elastic pocket, with the upper end connected to the esophagus and the lower end connected to the duodenum. The entrance to the esophagus is called the cardia and the exit to the duodenum is called the pylorus. There is a ring-shaped thickened muscle at the pylorus called the pyloric sphincter.

The structure of the stomach is divided into three parts: the fundus, the body of the stomach and the antrum, the stomach has two walls, the front and back, and the upper and lower curves, the shorter upper side is the small gastric curvature, and the longer lower side is the greater gastric curvature. The small curvature of the stomach and the pylorus are both common sites for ulcer disease, and the duodenum is close to the pylorus, and its length is basically the same as the width of the twelve fingers, so it is called the duodenum.

The stomach is divided into four parts: antrum, gastric body, gastric horn, and fundus. Due to the artificial division, the position of the fundus at the junction of the cardia and the stomach is called the fundus, and the position is relatively high. The antrum is where the duodenum and the pyloric portal are located, the body of the stomach is the middle of the fundus and the antrum, and the horn of the stomach is on the side of the small curvature of the stomach, that is, the junction of the body and the antrum.

a.Fundus, corpus, antrum.

b.Gastric body, gastric curvature, gastric curvature, Xiaosen fundus.

c.Stomach guess spring spike bottom, stomach body, pylorus, cardia (correct answer) dThe greater curvature of the stomach, the pylorus, the cardia, and the corpus gastricus.

e.Gastric curvature, cardia part, pyloric canal, fundus.

The division of the stomach does not include: angular notch.

The stomach is the body's digestive organ, located under the diaphragm, connecting to the esophagus and down to the small intestine. The upper mouth of the stomach is the cardia and the lower mouth is the pylorus. The stomach is also known as stomach belly (guǎn tube, also read wǎn bowl), and the ancient pronunciation of "脘" is the same as "tube", and the meaning is also the same.

Therefore, above the stomach is the esophagus, below the stomach is the intestinal tube, and the stomach is called the gastric tube (navel) between the two. It is divided into four parts, the cardia part, the fundus of the stomach, the corpus gastric and the pyloric part.

The part near the cardia is called the cardia department. Above the cardia plane. The bulging part to the upper left is called the fundus. The middle part from the fundus down to the angular notch is called the corpus gastric. The part between the lower boundary of the gastric body and the pylorus is called the pylorus.

Innervation: The gastrointestinal tract is mainly innervated by the central nervous system (CNS) and the enteric nervous system (ENS), although the enteric nervous system is regulated by the central nervous system, it has an independent reflex arc, has an integrated function, and can directly receive various information in the gastrointestinal tract, which can be said to be a relatively independent system that participates in the regulation of gastrointestinal functions; At the same time, the number of nerve cells in the wall of the digestive tract is second only to the brain, so ENS is called the brain of the intestine.

Blood flow**:1Left gastric artery: straight celiac artery, there may be branches: cardia branch, esophageal branch, gastric branch. Parahepatic left; Paragastric left; The left side of the stomach is intrinsically anastomosed with the liver.

2.Right gastric artery: Originates from the hepatic artery propria.

3.Right gastroomentum artery: originates from the gastroduodenum.

4.Left gastroomental artery: originates from the main trunk and branches of the splenic artery.

5.Gastric short arteries: originate from the main trunk and branches of the splenic arteries.

6.Posterior gastric artery: arises from the superior border of the 1 3rd segment of the splenic truncus.

The division of the stomach does not include: angular notch.

The stomach is divided into four parts: the cardia part, the fundus, the gastric body, and the pylorus.

1. The cardia refers to the part of the vertical spike 2cm below the esophagogastric junction, which is mainly composed of columnar epithelial cells, cardia gland mucus cells, main cells and parietal cells;

2. The bottom of the stomach refers to the bulging part above the cardia plane to the upper left, which is located below the left diaphragm. The fundus can accept ingested food and is the reservoir of the stomach, and the fundus can secrete pepsin;

3. The part between the angle notch and the pylorus is the pylorus, and generally chronic gastritis mostly occurs in the gastric pylorus;

4. The larger part between the fundus and the pylorus is the gastric body, which can secrete hydrochloric acid and pepsin.

Innervation of the stomach:

The gastrointestinal tract is mainly innervated by the central nervous system (CNS) and the enteric nervous system (ENS), although the enteric nervous system is regulated by the central nervous system, it has an independent reflex arc, has an integrated function, and can directly receive various information in the gastrointestinal tract.

It can be said to be a relatively independent system, which participates in the regulation of gastrointestinal functions; At the same time, the number of nerve cells in the wall of the digestive tract is second only to the brain, so ENS is called the brain of the intestines.

The composition of the stomach.

Author[Qi Le] Posted on[2007-6-14 20:33:00]1, cardia: the opening of the esophagus into the stomach.

2. Gastric fundus: the part above the horizontal line of the cardia contains gas when it is in the upright position, which is called gastric bubble.

3. Cardia area: the circular area with the spray gate area as the center and a radius of about one.

4. Gastric curvature: the upper right edge of the stomach.

5. Gastric curvature: the outer and inferior edge of the stomach.

6. Gastric angle (angular notch): the turning point of the small curvature of the stomach.

7. Gastric antrum: the area between the angular notch and the lowest point of the greater curvature and the pylorus.

8. Gastric body: the area between the cardia and the gastric horn.

9. Prepyloric area: a section of the antrum 4 5 cm proximal to the pylorus.

10. Pylorus (pyloric tube): a thin, short tubular structure leading to the duodenum in the stomach.