The digestive system is made up of the digestive tract – a series of hollow organs joined in a long, twisting tube from the mouth to the anus – and other organs that help the body break down and absorb food. Mouth, esophagus, stomach, small intestine, large intestine – also called the colon – rectum, and anus. Inside these hollow organs is a lining called the mucosa. In the mouth, stomach, and small intestine are the organs which helps in the digestion.
Digestion involves mixing food with digestive juices, moving it through the digestive tract, and breaking down large molecules of food into smaller molecules. Digestion begins in the mouth, when you chew and swallow, and is completed in the small intestine.