As food travels through a person’s digestive system, the body uses enzymes to break it down into smaller molecules. This process is chemical digestion.

Here, learn about the parts of the digestive system, how they work, and how to recognize any problems. ... The jejunum: Most of the chemical digestion and absorption occur here.

The digestive system is the series of tubelike organs that convert our meals into body fuel. There are about 30 feet (9 meters) of these convoluted pipeworks, starting with the mouth and ending ...

The digestive system needs to get food and drink into our bodies called ingestion, ... Like the mouth, the stomach does both mechanical and chemical digestion.