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Stomach

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Last Updated: 18 January 2022

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General | Latest Info

Stomach

Details
PrecursorForegut
SystemDigestive system
ArteryRight gastric artery , left gastric artery , right gastro-omental artery , left gastro-omental artery , short gastric arteries
VeinRight gastric vein , left gastric vein , right gastroepiploic vein , left gastroepiploic vein , short gastric veins
NerveCeliac ganglia , vagus nerve
LymphCeliac lymph nodes
Identifiers
LatinVentriculus
GreekGaster
MeSHD013270
TA98A05.5.01.001
TA22901
FMA7148
3D Medical Animation Stomach Structure.jpg "3D Medical Animation Stomach Structure.jpg", by https://www.scientificanimations.com, licensed under CC BY-SA 4.0

Cancer starts when cells in body begin to grow out of control. Cells in nearly any part of body can become cancer, and can spread to other areas of body. To learn more about how cancers start and See What Is Cancer? Stomach Cancer, also called gastric Cancer, starts in stomach. To understand Stomach Cancer, it helps to know about normal structure and function of stomach. Stomach Cancer, also called gastric Cancer, starts in stomach. To understand Stomach Cancer, it helps to know about normal structure and function of stomach. Stomach After food is chewed and swallow, it enters Esophagus, tube that carries food through throat and chest to stomach. Esophagus Joins Stomach At Gastroesophageal Junction, Which Is Just Beneath Diaphragm. Stomach Is Sac-like Organ That Holds Food And Starts To Digest It By Secreting Gastric Juice. Food and gastric juice are mixed and then emptied into first part of small intestine called duodenum. Some people use word Stomach to refer to area of body between chest and pelvic area. Medical Term For This Area Is Abdomen. For instance, some people with pain in this area would say they have stomachache, when in fact, pain could be coming from appendix, small intestine, colon, or other organs in area. Doctors would call this symptom abdominal pain, because stomach is only one of many organs in abdomen. Stomach Cancer should not be confused with other cancers that can occur in abdomen, like cancer of colon, liver, pancreas, or small intestine, because these cancers can have different symptoms, different outlooks, and different treatments. Parts of stomach have 5 parts: innermost layer is mucosa. This is where stomach and digestive enzymes are make. Most stomach start in this layer. Next is supporting layer called submucosa. Outside of this, Is muscularis propria, layer of muscle that moves and mixes stomach contents. Outer 2 Layers, Subserosa And Outermost Serosa, Wrap Stomach. Layers are important in determining stage of cancer and in helping determine person's prognosis. As cancer grows from mucosa into deeper layers, stage becomes more advanced and is not as good. Development of Stomach Cancer Stomach cancers tend to slowly over many years. Before true cancer develop, pre-cancerous changes often occur in inner lining of stomach. These early changes rarely cause symptoms and therefore go undetected. Cancers starting in different sections of stomach may cause different symptoms and tend to have different outcomes. Cancer location also affect treatment options. For example, cancers that start at GE junction are stag and treated same as cancers of esophagus.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

Related video

31 January 2017How does the Stomach Function?

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

Structure

So far, weve seen external, macroscopic structure of stomach. Lets dive deeper to see internal and microscopic structure. Stomach Consists Of Four Histological Layers Call, From Interior To Exterior, Mucosa, Submucosa, Muscularis Externa, And Serosa. When stomach is empty or contains very small quantities of food, it is in contracted, shrunken state. Mucosa has wrinkle aspect, consisting of ridges called Gastric folds, or rugae. During distension organ, Gastric folds disappear. Along lesser curvature of stomach, temporary, continuous furrow called Gastric canal is formed between Gastric folds. This facilitates passage saliva and fluids during swallowing. Mucosa is lined by simple columnar epithelium which is covered by protective, alkaline mucous layer. Epithelial Layer Contains Numerous Invaginations, Called Gastric Pits, That Extend Deeper Into Structures Called Gastric Glands. Depending on part of stomach, these glands consist of various cell types. Mucous neck cells produce mucous layer, while Parietal cells hydrochloric Acid. Chief cells release pepsinogen, inactive precursor that will transform into active pepsin enzyme in low pH environment. In turn, neuroendocrine cells various hormones mentioned previously. Moving externally, layer is submucosa. It consists of connective tissue containing blood vessels and nerves. Third Layer Is Called Muscularis Externa And Consists Of Three Smooth Muscle Sub-layers. From internal to external, they are called inner oblique, middle circular, external longitudinal. Inner Oblique Layer Is Located Throughout Entire Organ And Works In Unison With Other Layers To Produce Physical Motion And Contractions Of Stomach Required For Digestion. Middle Circular Layer Is Located Concentrically To Long Axis Of Stomach Throughout Organ And Plays Important Role In Forming Pyloric Sphincter. External Longitudinal Layer Is Situated In Two Curvatures Of Stomach In Longitudinal Fashion. Last but not least, serosa consists of visceral peritoneum that covers stomach.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

Development

In early human embryogenesis, ventral part of embryo abuts yolk sac. During third week of development, as embryo grows, it begins to surround parts of sac. Enveloped portions form basis for adult gastrointestinal tract. Sac is surrounded by network of vitelline arteries and veins. Over time, arteries consolidate into three main arteries that supply developing gastrointestinal tract: celiac artery, superior mesenteric artery, and inferior mesenteric artery. Areas supplied by these are used to define foregut, midgut, and hindgut. Surround sac become primitive gut. Sections of this gut begin to differentiate into organs of gastrointestinal tract, and and stomach form from foregut.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

Sources

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

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