Explain the process of digestion in detail.

Digestion is the process by which the complex food is broken down into simpler, soluble chemical compounds which is then used as nutrients by the body. The food is digested physically, by mouth or chemically, by enzymes. The digestion begins at mouth. In mouth, the food is broken down into smaller pieces by teeth. It is then mixed with saliva. Enzyme amylase breaks down starch into simple carbohydrate. The food then travels to esophagus via pharynx. By the peristaltic movement, the food moves from esophagus to the stomach. The acid and enzymes present in the stomach breaks down the food further. Gastric juices present in stomach contains protease enzyme which breaks down proteins. Food then enters the small intestine. Enzymes released by the pancreas and bile released from the liver enters in duodenum part of small intestine. Bile carries out the digestion of fat. Enzymes released by the pancreas break down protein, fat and carbohydrates. Absorption takes place in other two parts of small intestine, namely jejunum and ileum. The indigestible food enters the large intestine. In large intestine, maximum absorption of water takes place. The waste then enters the rectum in the form of stool which is comes out from the anus.