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WHAT ARE THE CHANGES OCCURING TO THE FOOD IN THE STOMACH

 The esophagus pushes the food and saliva mixture down into the stomach, which is basically a bag full of gastric acid. Gastric acid is a fluid made by the glands and hormones in the body. This fluid is how food gets broken down in the stomach even further. The stomach also moves gastric acid, food particles and saliva around together like a blender.
Physical breakdown
Waves of muscular contraction along your stomach wall, known as peristalsis, break food down into smaller pieces, mix it with fluids secreted from your stomach lining and move it through your stomach. This creates a mixture that resembles thick cream.Our stomach protects itself from being digested by its own enzymes, or burnt by the corrosive hydrochloric acid, by secreting sticky, neutralising mucus that clings to the stomach walls. If this layer becomes damaged in any way it can result in painful and unpleasant stomach ulcers.
Stomach
 The stomach is a large, sack-like organ that churns the food and bathes it in a very strong acid (gastric acid). Food in the stomach that is partly digested and mixed with stomach acids is called chyme.

In the small intestine - After being in the stomach, food enters the duodenum, the first part of the small intestine. It then enters the jejunum and then the ileum (the final part of the small intestine). In the small intestine, bile (produced in the liver and stored in the gall bladder), pancreatic enzymes, and other digestive enzymes produced by the inner wall of the small intestine help in the breakdown of food.

In the large intestine - After passing through the small intestine, food passes into the large intestine. In the large intestine, some of the water and electrolytes (chemicals like sodium) are removed from the food. Many microbes (bacteria like Bacteroides, Lactobacillus acidophilus, Escherichia coli, and Klebsiella) in the large intestine help in the digestion process. The first part of the large intestine is called the cecum (the appendix is connected to the cecum). Food then travels upward in the ascending colon. The food travels across the abdomen in the transverse colon, goes back down the other side of the body in the descending colon, and then through the sigmoid colon.

Release of food into small intestine.

When food has been broken down sufficiently, small amounts are squirted out of your stomach into your small intestine for further processing. This normally occurs within four hours of eating a meal, but can take six or more hours if your meal has a high fat content
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