Stomach
Stomach(To be, stomach)
Alimentary canalAt one of region,EsophagusIt continues next,Small intestineIt is connectedOrganIs. At the place where the food which you swallow after that is stored to several hours, it is secreted from the stomach wallHydrochloric acidWith (gastric fluid), although it sterilizes by the fact that those which were eaten are maintained at acidity and prevents corruption the digestion enzymePepsinWith,ProteinThe mud mud which is called the peptone in the water soluble disassembly product which is doneDigestionIt is done.
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Structure of stomach
As for the stomach of the person, the entrance and the exit are narrow, with the organ of the sack condition where the middle expands, near the entrance which is connected to the esophagusCardiaNear the exit which is connected to the section and the duodenumPylorusSection, region other than thatStomach bodyIt calls the section. The whole has curved arc-shaped in the right side, from the cardia to the pylorus to be large the left side which has expandedLarge 彎(Is, you do not call), the right side where it becomes the shape where the swelling curves small converselySmall 彎(To do, the ょ う cup) it calls. Furthermore,Stomach bottomAs for being called the section, with thing of the part which is close to the cardia at top of the stomach, as for this name, when operating the stomach surgically, in order the stomach compared to open abdomen from the region under, when you see from there, in the stomach most from the fact that it is categorized to the inner part.
With body of person,DiaphragmUnder,LiverIt is located on the left side, when it does not have content, as for the wall inside it makes the pleat and is shrunk, but at the time of a state where after the food it expands with the food, in the extent where you can feel that you project on the abdomen front it expands ("all the way state of the your generally known inside").
Microstructure and stomach gland of mucous membrane
The wall of the stomach has done 3 layer system. The mucous membrane and the mucous membrane lower stratum, it is muscle layer from inside. The outer part of muscle layer is covered with the peritoneum. In mucous membrane,Stomach small fossa(To do to be, the ょ う) with the minute hole which is called has lined up countlessly. On bottom of stomach small fossa,Stomach gland(The tubular secreting gland which is called stomach bottom gland) opens, this gland has extended to the lowest layer of the mucous membrane. Mainly, the pepsin of hydrochloric acid and the digestion enzyme is secreted from this secreting gland. Among the cells of the stomach gland, the oxyntic cell secretes hydrochloric acid, the main cell secretes the pepsinogen which is the precusor of the pepsin. The pepsinogen is disassembled, when it meets to hydrochloric acid, changes in the pepsin of active type.
The cell which covers the surface of the mucous membrane of the stomach in order to protect cell itself from acidity of hydrochloric acid and the digestion by the pepsin, has secreted the mucus.
Disease of stomach
- Gastritis
- Gastric ulcer
- Stomach cancer
Relation
