The first stage of the digestion system is to break down food into a fine piece. When the food is physically broken down, digestive chemicals break the food down into small molecules.
The process of mechanical digestion by grinding the food with teeth. As well, in the mouth, an enzyme called salivary amylase begins to break down long starch molecules into maltose. Once the food is ready to be swallowed, it gathers into a ball called a bolus and sends to the part of the bolus called the pharynx. Once in the pharynx, the bolus next passes down the esophagus
When the food enters the stomach, it is mixed with the digestive juices. The stomach produc-es stomach acid; hydrochloric acid, and pepsin. Stomach acid activates the pepsin that digests