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1.Diaphragm:

The diaphragm is an important part of the body's digestive system. The muscular diaphragm separates the thoracic cavity from the abdominal cavity where most of the digestive organs are located. Suspicious muscles attach the ascending duodenum to the diaphragm. This muscle is thought to be useful in the digestive system in that the attachment provides a wide angle to the duodenojejunal flexibility to facilitate the passage of digestive tract. The diaphragm also sticks, and puts the liver in its empty space. The esophagus enters the abdomen through a hole in the diaphragm at T10 level

2.Stomach:

The stomach is a major part of the digestive tract and digestive system. It is a J-shaped organ attached to the anterior end and the duodenum at its lower extremity. Gastric acid, a by-product of gastric juice, plays a vital role in the digestive system, and it mainly contains hydrochloric acid and sodium chloride. The peptide hormone, gastrin, which is produced by G cells in the gastrointestinal tract, stimulates the production of gastric juice using digestive enzymes. Pepsinogen is a precursor enzyme (zymogen) produced by the main cells in the stomach, and gastric acid makes this use of the enzyme pepsin that initiates the digestion of proteins. As these two chemicals will damage the abdominal wall, mucus is released by countless abdominal glands in the abdomen, providing a thin layer of protection against the harmful effects of chemicals on the internal organs.

At the same time as protein is digested, mechanical inflammation occurs as a result of peristalsis, the waves of muscle contraction travel through the abdominal wall. This allows more food to continue to interact with digestive enzymes. Gastric lipase secreted by the main cells in the fundic components of the gastrointestinal tract, is an acidic lipase, unlike alkaline pancreatic lipase. This lowers fat to some extent even though it is not as effective as pancreatic lipase.

The pylorus, the lower part of the stomach that attaches to the duodenum via the pyloric canal, contains countless glands that secrete digestive enzymes including gastrin. After an hour or two, a thick liquid called chyme is produced. When the pyloric sphincter, or valve opens, the chyme enters the duodenum where it continuously mixes with digestive enzymes from the pancreas, and then passes through the small intestine, where digestion continues. When the chyme is completely digested, it enters the bloodstream. 95% of nutrient intake occurs in the small intestine. Water and minerals are returned to the blood in the colon of the large intestine, where the environment has less acid. Other vitamins, such as biotin and vitamin K produced by bacteria in the intestinal flora of the colon also enter.

The parietal cells in the gastrointestinal tract, produce glycoprotein called intrinsic factor which is essential for the absorption of vitamin B12. Vitamin B12 (cobalamin), which is taken, and in the stomach, is bound to the glycoprotein secreted by the salivary glands - transcobalamin I also call haptocorrin, which protects the acid-sensitive vitamin from the acidic stomach contents. Once in the neutral duodenum, pancreatic enzymes break down the protective glycoprotein. Vitamin B12 is released and binds to the substance and is absorbed by enterocytes in the ileum.


The stomach is an inseparable organ and can normally grow up to hold about a liter of food. [22] This expansion is powered by a series of abdominal mucus in the inner walls of the abdomen. The abdomen of a newborn baby will only be able to enlarge and store about 30 ml.
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