WHEN you eat the food from your mouth goes down a tube called the oesophagus and then into your stomach. It is stored in the stomach temporarily, then later digested.
As the food arrives the stomach wall starts its glands working.
One type of gland gives off a mucus that lubricates the food. Other glands give off acids that kill any bacteria in the food, while still others give off special chemicals, called enzymes, to break down the food into tiny particles.
The stomach's strong muscles break down the food and chemicals into a liquid. This breaking down is done in peristaltic wavy movements. These waves work on a regular schedule every two seconds. They then squeeze the liquid to the other end of the stomach by contractions of the stomach muscles.
A special ring-like muscle guards that bottom opening, first allowing only the liquid to pass through, then allowing some pulpy food to enter your small intestines, where digestion continues.
Stomachs change shape depending on the amount of food in them. The stomachs of most adults hold almost a litre of liquid and food. - bigsiteofamazingfacts.com; time.com; coolquiz. com