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Some people are unable to digest lactose. Max Pixel That triple-chocolate milkshake with whip cream you sucked down at dinner might be the cause of your bedtime stomach pains. "Some people lack the enzyme to digest lactose, a natural sugar in dairy products," said Amengual.


The stomach wall contains glands, groups of specialized cells that make and release particular substances. These glands produce acid, which kills bacteria and helps to digest food. They also make digestive enzymes, special chemicals that start breaking down the protein in foods such as meat.


There are intricate forces at play to make sure your stomach doesn’t digest itself. Alex Hogan, Matthew Orr/STAT T he human stomach is in a constant, epic battle not to eat itself.


The condition delays stomach emptying and causes bloating, nausea and other digestive symptoms. By Tamara Duker Freuman , Contributor Aug. 9, 2018 By Tamara Duker Freuman , Contributor Aug. 9 ...


The chemical digestion begun in the stomach will not be completed until chyme reaches the intestines, but the stomach prepares hard-to-digest proteins and fats for further digestion. Hormonal Control The activity of the stomach is under the control of several hormones that regulate the production of stomach acid and the release of food into the ...


Without stomach acid, you can't digest protein. Once the protein is partially digested, food is released from the stomach into the small intestine, where the majority of digestion and absorption takes place. You need an enzyme called pepsin to digest protein.


Digestive Functions of the Stomach. The stomach participates in virtually all the digestive activities with the exception of ingestion and defecation. Although almost all absorption takes place in the small intestine, the stomach does absorb some nonpolar substances, such as alcohol and aspirin. Mechanical Digestion


This defense system does not work as well as it should in some people due to problems with the blood supply to the stomach, or when overproduction of acid occurs. This can cause gastric ulcers. Sometimes specific bacteria, called Helicobacter pylori, may cause interfere with the stomach's defenses and can also result in ulcers.


The stomach is the widest part of the digestive system. It not only digests food, it also stores it. According to the BBC , the stomach can hold a bit more than a quart (1 liter) of food at once.


Protein digestion, on the other hand, takes places mostly in the stomach (mechanical digestion, or the process of breaking down food into smaller pieces, begins in the mouth, though). The digestion of lipids takes places mostly in the small intestine. These processes are facilitated by several enzymes released by your pancreas and other organs.