Description
Digestive system converts eaten food into energy and basic nutrients. Main parts of the digestive system are the mouth, pharynx, esophagus, stomach, spleen, liver, pancreas, small intestine and the large intestine. These parts perform ingestion, secretion, mixing and movement, digestion, absorption and excretion functions. Digestive system can be examined simply by analyzing blood, urine and stool samples but more advanced or more invasive methods such as biopsies and MRI scans are often needed.