Dear Madam,
Hope this article will explain your question.
All the best.
Stomach is an enlarged part of the alimentary canal. It lies between the esophagus and the small intestine. In people and most animals, it is a simple baglike organ. In cows, sheep, and other ruminants (animals that chew their cud), it has four compartments and is more complicated than a human stomach.
A human being's stomach is shaped much like a J. In most people, it is located in the upper left side of the abdomen. The upper end of the stomach connects with the esophagus. The lower end opens into the duodenum, the upper end of the small intestine. The stomach is a muscular organ. The muscles in the stomach's wall enable it to churn and mix its contents and fit its shape to the amount of food it holds. The average adult stomach can hold a little over 1 quart (0.95 liter).
The stomach's work. The stomach serves as a storage place for food, so that a large meal may be eaten at one time. Food in the stomach is discharged slowly into the intestines. The stomach also helps digest food.
Glands in the stomach wall secrete mucus to lubricate the food. Other glands give off hydrochloric acid and the enzyme pepsin to help digest the food, and a substance called intrinsic factor to aid the absorption of vitamin B-12. The hydrochloric acid kills many microorganisms (tiny living organisms such as bacteria) in the food.
The stomach muscles churn the food and digestive juices into a mass called chyme (pronounced kym). The muscles then contract and squeeze the chyme toward the pyloric (intestinal) end of the stomach. These contractions, called peristaltic waves, occur about 20 seconds apart. They start at the top of the stomach and move downward. The pyloric sphincter, a ringlike muscle around the duodenal opening, keeps the chyme in the stomach until it is almost a liquid. Then the pyloric sphincter relaxes and lets some chyme pass into the duodenum.
The churning action of the stomach tends to begin at usual mealtimes. When people say their stomach is "growling," they are referring to these peristaltic waves. Sometimes, these movements grow so strong that they squeeze acid gastric juice up into the lower part of the esophagus. Fluids from the stomach can irritate or damage the lining of the esophagus and produce heartburn.
The pyloric sphincter allows water to pass through almost as soon as it enters the stomach. The time that the stomach retains food varies. On the mixed diet most people eat, the stomach empties in three to five hours.
2006-11-21 04:45:56
·
answer #2
·
answered by Hello Friends 1
·
1⤊
1⤋
Your abdomen makes weird and wonderful noises whilst your hungry because of the fact it like style of reminds you to feed your self.i'm purely making an knowledgeable wager.easily,i do no longer likely recognize.this is a question for a well being or technology instructor.
2016-10-17 08:18:18
·
answer #3
·
answered by Anonymous
·
0⤊
0⤋