In the human digestive system, many of the organs works together and perform their functions, it consists of the gastrointestinal tract and the organs used in all the process of digestion such as the tongue, salivary glands, pancreas, liver, and gallbladder.

Digestion involves the breakdown of food into smaller components, until they can be absorbed easily into the body. Digestion process has three stages. At the cephalic phase of digestion which begins with the process includes the mechanical breakdown of food by chewing, and the chemical breakdown by saliva contains digestive enzymes called amylase second is lingual lipase secreted from salivary glands and serous glands in the tongue.

The enzymes start to break down the food in the mouth by chewing in where the food is mixed with saliva and start the mechanical process of digestion which then engulphed to stomach. In the stomach, the food is further broken down by mixing with gastric acid until it passes into the duodenum. where it is mixed with enzymes formed by the pancreas.

Finally, food fully is broken down in the small intestine and is absorbed by it. Most of the of food digested in the small intestine such as water and some minerals are reabsorbed back into the blood in the colon of the large intestine. Then body after digestion eliminates waste from the anus via the rectum.