Digestion is the route of turning large pieces of food into its component chemicals. Mechanical digestion is the physical breakdown of large bits of food into smaller bits. They way of digestion starts with chewing the food by the teeth and the food is then continued through the muscular mixing of food by the stomach and intestines. Bile formed by the liver is also used to automatically break fats into smaller drops. While the food is being mechanically digested it is also being chemically digested as bigger and more compound molecules are being broken down into smaller molecules that are easier to absorb. Chemical digestion will begin in the mouth with salivary amylase in saliva splitting complex sugars into simple sugars. The enzymes and acid in the stomach carry on chemical digestion, but the loss of chemical digestion takes place in the small intestine thanks to the act of the pancreas.
The oesophagus is a muscular tube linked to the pharynx to the stomach that is part of the upper gastrointestinal tract. It will carry swallowed masses of chewed up food along its length. At the lower end of the oesophagus is a muscular ring called the lower oesophageal sphincter or cardiac sphincter. The purpose of this sphincter is to close of the end of the oesophagus and trap food in the stomach. The stomach is a muscular sac that is set on the left side of the abdominal cavity. The organ acts as a storing tank for food so that the body has time to digest large meals correctly. The stomach also has hydrochloric acid and digestive enzymes that continue the digestion of food that began in the mouth.
The small intestine is placed just lower than the stomach and takes up most of the room in the abdominal cavity. The small intestine is twisted like a pipe and the inside surface is full of many ridges and folds. These folds are used to maximize the digestion of